Faculty

John M. AlexanderJohn M. Alexander, Professor

B. S., 1953, Davidson College
Ph.D., 1956, Massachusetts Institute of Technology
Postdoctoral Fellow, Massachusetts Institute of Technology, 1957
Alfred P. Sloan Research Fellowship, 1964-67

Phone: (631) 632-7904
Fax: (631) 632-7987

Email:

 

 

 

Research Summary

In recent years reactions between complex nuclei have emerged as one of the most active areas of fundamental research in nuclear science. Our nuclear chemistry group at Stony Brook is pursuing this field in several collaborative efforts. An active experimental program involves measurements of energy and angular distributions of charged particles after reactions such as 40Ar + 108Ag. The experimental tools we use include electronic detectors, primarily of charged particles emitted in heavy-ion collisions. We measure the light charged particles H, He, etc., heavy fragments such as those from fragmentation or fusion reactions, and the coincident detection of two or more of these.

Each student participates in both the experimental and theoretical aspects of research. Recent experiments have utilized accelerators at Stony Brook, Michigan State University, and Lawrence Berkeley Laboratory and in France at Grenoble and Caen. Most of these experiments involve a collaboration among about a dozen scientists, some located at the accelerator laboratory itself and some at Stony Brook. Often, members of other groups in Europe, Asia, and South or North America visit for several months or years at Stony Brook. This continuing game of musical chairs has been very rewarding for each participant. The Nuclear Structure Laboratory and the Nuclear Theory Group, both in the Department of Physics at Stony Brook, are also very active colleagues in local and international research enterprises.

Scientific advances must always involve the interplay between experiment and theory. As experimental results give new insights, theoretical models must be altered and reformed. Students also participate in these theoretical comparisons and advances.

Awards/Honors

  • John Simon Guggenheim Fellowship Award,1969-70
  • American Chemical Society Award for Nuclear Chemistry, 1991

Publications

Longitudinal flow of protons from (2-8)A GeV central Au plus Au collisions Klay JL, Ajitanand NN, Alexander JM, Anderson MG, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Chung P, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Krofcheck D, Lacey RA, Lauret J, Law C, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin SY, Pinkenburg C, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NTB, Symons TJM, Wang S, Wells R, Whitfield J, Wienold T, Witt R, Wood L, Zhang WN PHYSICAL REVIEW LETTERS 88 (10): art. no. 102301 MAR 11 2002

Laying the groundwork at the AGS: Recent results from experiment E895 Lisa MA, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Chung P, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Law C, Lauret J, Liu H, Liu YM, McGrath RL, Milosevich Z, Odyniec G, Olson DL, Pinkenburg C, Panitkin S, Porile NT, Rai G, Ritter HG, Romero JL, Scharenburg R, Schroeder LS, Srivastava B, Stone NTB, Symons TJM, Wang S, Wells R, Whitfield J, Wienold T, Witt R, Wood L, Zhang WN, NUCLEAR PHYSICS A 698: 185C-192C FEB 11 2002

Production and collective behavior of strange particles in Au plus Au collisions at 2-8 AGeV, Pinkenberg C, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Chung P, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Law C, Lauret J, Lisa MA, Liu H, Liu YM, McGrath RL, Milosevich Z, Odyniec G, Olson DL, Panitkin S, Porile NT, Rai G, Ritter HG, Romero JL, Scharenburg R, Schroeder LS, Srivastava B, Stone NTB, Symons TJM, Wang S, Whitfield J, Witt R, Wood L, Zhang WN, NUCLEAR PHYSICS A 698: 495C-498C FEB 11 2002

Directed flow of Lambda hyperons in (2-6)A GeV Au+Au collisions, Chung P, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Cole B, Crowe K, Das A, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Lauret J, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin SY, Pinkenburg C, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NTB, Symons TJM, Wienold T, Witt R, Whitfield J, Wood L, Zhang WN, PHYSICAL REVIEW LETTERS 86 (12): 2533-2536 MAR 19 2001

Lambda flow and Lambda-P correlation in Au plus Au collisions at AGS energies Chung P, Alexander JM, Ajitanand NN, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Law C, Lauret J, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin S, Pinkenburg C, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NTB, Symons TJM, Whitfield J, Witt R, Wood L, Zhang WN, JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 27 (3): 293-299 MAR 2001

Azimuthal dependence of pion interferometry at the AGS, Lisa MA, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Chung P, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Lauret J, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin SY, Pinkenburg C, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NTB, Symons TJM, Wells R, Whitfield J, Wienold T, Witt R, Wood L, Zhang WN, PHYSICS LETTERS B 496 (1-2): 1-8 DEC 21 2000

Antiflow of K-s(0) mesons in 6A GeV Au+Au collisions, Chung P, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Cole B, Crowe K, Das A, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Lauret J, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin SY, Pinkenburg C, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NTB, Symons TJM, Wienold T, Witt R, Whitfield J, Wood L, Zhang WN, PHYSICAL REVIEW LETTERS 85 (5): 940-943 JUL 31 2000

Isotropic emission components in splintering central collisions: (17-115)A MeV Ar-40+Cu, Ag, Au, Sun RL, Colin E, Ajitanand NN, Alexander JM, Barton MA, DeYoung PA, Drake KL, Elmaani A, Gelderloos CJ, Gualtieri EE, Guinet D, Hannuschke S, Jaasma JA, Kowalski L, Lacey RA, Lauret J, Norbeck E, Pak R, Peaslee GF, Stern M, Stone NTB, Sundbeck SD, Vander Molen AM, Westfall GD, Yang LB, Yee J, PHYSICAL REVIEW C 61 (6): art. no. 061601 JUN 2000

Nuclear disassembly in violent central collisions at intermediate energies: (65-115)A MeV Ar-40+Cu, Ag, Au, Colin E, Sun RL, Ajitanand NN, Alexander JM, Barton MA, DeYoung PA, Drake KL, Elmaani A, Gelderloos CJ, Gualtieri EE, Guinet D, Hannuschke S, Jaasma JA, Kowalski L, Lacey RA, Lauret J, Norbeck E, Pak R, Peaslee GF, Stern M, Stone NTB, Sundbeck SD, Vander Molen AM, Westfall GD, Yang LB, Yee J, PHYSICAL REVIEW C 61 (6): art. no. 067602 JUN 2000

Bombarding energy dependence of pi(-) interferometry at the Brookhaven AGS Lisa MA, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Chung P, Cole B, Crowe K, Das AC, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Lauret J, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin SY, Pinkenburg C, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NTB, Symons TJM, Wells R, Whitfield J, Wienold T, Witt R, Wood L, Zhang WN, PHYSICAL REVIEW LETTERS 84 (13): 2798-2802 MAR 27 2000

Balance of mass, momentum, and energy in splintering central collisions for Ar-40 up to 115 MeV/nucleon, Sun RL, Colin E, Ajitanand NN, Alexander JM, Barton MA, DeYoung PA, Drake KL, Elmaani A, Gelderloos CJ, Gualtieri EE, Guinet D, Hannuschke S, Jaasma JA, Kowalski L, Lacey RA, Lauret J, Norbeck E, Pak R, Peaslee GF, Stern M, Stone NTB, Sundbeck SD, Vander Molen AM, Westfall GD, Yang LB, Yee J, PHYSICAL REVIEW LETTERS 84 (1): 43-46 JAN 3 2000

Elliptic flow: Transition from out-of-plane to in-plane emission in Au plus Au collisions Pinkenburg C, Ajitanand NN, Alexander JM, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Chung P, Cole B, Crowe K, Das AC, Draper JE, Elmaani A, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Lauret J, Law C, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin SY, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NTB, Symons TJM, Whitfield J, Wienold T, Witt R, Wood L, Zhang WN, PHYSICAL REVIEW LETTERS 83 (7): 1295-1298 AUG 16 199

Neutral strange particle production and flow at AGS energies, Chung P, Alexander JM, Ajitanand NN, Anderson M, Best D, Brady FP, Case T, Caskey W, Cebra D, Chance JL, Cole B, Crowe K, Das A, Draper JE, Gilkes ML, Gushue S, Heffner M, Hirsch AS, Hjort EL, Huo L, Justice M, Kaplan M, Keane D, Kintner JC, Klay J, Krofcheck D, Lacey RA, Law C, Lisa MA, Liu H, Liu YM, McGrath R, Milosevich Z, Odyniec G, Olson DL, Panitkin S, Pinkenburg C, Porile NT, Rai G, Ritter HG, Romero JL, Scharenberg R, Schroeder L, Srivastava B, Stone NTB, Symons TJM, Whitfield J, Zhang WN, JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 25 (2): 255-261 FEB 1999

Disappearance of elliptic flow: A new probe for the nuclear equation of state Danielewicz P, Lacey RA, Gossiaux PB, Pinkenburg C, Chung P, Alexander JM, McGrath RL PHYSICAL REVIEW LETTERS 81 (12): 2438-2441 SEP 21 1998

Splintering central collisions: Systematics of momentum and energy deposition for (17-115)A MeV Ar-40 Colin E, Sun RL, Ajitanand NN, Alexander JM, Barton MA, DeYoung PA, Elmaani A, Gelderloos CJ, Gualtieri EE, Guinet D, Hannuschke S, Jasma JA, Kowalski L, Lacey RA, Lauret J, Norbeck E, Pak R, Peaslee GF, Stern M, Stone NTB, Sundbeck SD, Vander Molen AM, Westfall GD, Yee J PHYSICAL REVIEW C 57 (3): R1032-R1036 MAR 1998

Dynamics of radial collective energy in near central collisions for 1A GeV Au+C Lauret J, Albergo S, Bieser F, Ajitanand NN, Alexander JM, Brady FP, Caccia Z, Cebra D, Chacon AD, Chance JL, Choi Y, Chung P, Costa S, Danielewicz P, Elliott JB, Gilkes M, Hauger JA, Hirsch AS, Hjort EL, Insolia A, Justice M, Keane D, Kintner J, Lacey RA, Lindenstruth V, Lisa MA, Matis HS, McGrath R, McMahan M, McParland C, Muller WFJ, Olson DL, Partlan MD, Porile NT, Potenza R, Rai G, Rasmussen J, Ritter HG, Romanski J, Romero JL, Russo GV, Sann H, Scharenberg R, Scott A, Shao Y, Srivastava BK, Symons TJM, Tincknell M, Tuve C, Wang S, Warren P, Wienold T, Wieman HH, Wolf K PHYSICAL REVIEW C 57 (3): R1051-R1055 MAR 1998

Classical tests for statistical evaporation at 680 MeV Ar-40+Ag-nat Gelderloos CJ, Alexander JM, Boger J, Magda MT, Narayanan A, DeYoung PA, Elmaani A, McMahan MA PHYSICAL REVIEW C 54 (6): 3056-3061 DEC 1996

MODGAN: An efficient Monte Carlo code for long chains of evaporative emission Ajitanand N, Alexander JM NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 376 (2): 213-216 JUL 1 1996

Fusionlike reactions of Ar-40 up to 1.36 GeV: Prethermalization and postthermalization particles and fragments Magda MT, Bauge E, Elmaani A, Braunstein T, Gelderloos CJ, Ajitanand NN, Alexander JM, Ethvignot T, Bier P, Kowalski L, Desequelles P, Elhage H, Giorni A, Kox S, Lleres A, Merchez F, Morand C, Stassi P, Benrachi JB, Chambon B, Cheynis B, Drain D, Pastor C PHYSICAL REVIEW C 53 (4): R1473-R1477 APR 1996

Emission times for energy selected H-1,H-2,H-3 ejectiles from central collisions: 1360 MeV Ar-40+Ag Gelderloos CJ, Sun RL, Ajitanand NN, Alexander JM, Bauge E, Elmaani A, Ethvignot T, Lacey RA, Brandan ME, Giorni A, Heuer D, Kox S, Lleres A, MenchacaRocha A, Merchez F, Rebreyend D, Viano JB, Chambon B, Cheynis B, Drain D, Pastor C PHYSICAL REVIEW C 52 (6): R2834-R2838 DEC 1995

Correlation measurements of light charged particles emitted from S-32+Al-27 reactions at energies of 105 MeV and 215 MeV DeYoung PA, Ajitanand NN, Alexander JM, Datar V, Gelderloos CJ, Gilfoyle G, Gordon MS, McGrath RL, Peaslee GF, Sarafa J PHYSICAL REVIEW C 52 (6): 3488-3491 DEC 1995

COINCIDENCE CORRELATIONS BETWEEN LIGHT CHARGED-PARTICLES IN THE MATCHED REACTIONS 905-MEV AND 1030-MEV SB-121+AL-27 AND 550-MEV AND 750-MEV KR-86+CU-63 PARKER WE, KAPLAN M, MOSES DJ, ALEXANDER JM, LACEY RA, DECASTRORIZZO DM, BOGER J, NARAYANAN A, PEASLEE GF, POPESCU DG NUCLEAR PHYSICS A 594 (1): 1-26 NOV 6 1995

TIME RELATIONSHIPS BETWEEN DIRECT PARTICLE-EMISSION AND FRAGMENTATION - A PROBE FOR NUCLEAR EXPANSION PRIOR TO FRAGMENT FREEZE-OUT GELDERLOOS CJ, ALEXANDER JM, AJITANAND NN, BAUGE E, ELMAANI A, ETHVIGNOT T, KOWALSKI L, LACEY RA, BRANDAN ME, GIORNI A, HEUER D, KOX S, LLERES A, MENCHACAROCHA A, MERCHEZ F, REBREYEND D, VIANO JB, CHAMBON B, CHEYNIS B, DRAIN D, PASTOR C PHYSICAL REVIEW LETTERS 75 (17): 3082-3085 OCT 23 1995

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