Jesse Weil

  • Professor Emeritus
  • Physics & Astronomy

B.S., Physics, Caltech (1952)
Ph.D., Experimental Nuclear Physics, Columbia (1959)


My major experimental work at this time is the investigation of the level structure of the even-A tin isotopes 116,120,124Sn using the (n,n'gamma) reaction. I am searching for evidence of multi-phonon vibrational excitations, as well as other collective excitations, embedded in a background of shell model states. Since we can determine the position of all the levels up to 3.5 MeV excitation, we can also make an analysis of the density of these levels and compare it to recent level-density models. I am embarking on a program to investigate the fission properties of actinides when bombarded by cold neutrons at the reactor of the KFKI in Budapest. The level structure of the fission products will also be studied.

Selected Publications: 
  • "Strongly enhanced low energy alpha-particle decay in heavy actinide nuclei and long-lived superdeformed and hyperdeformed isomeric states", A. Marinov, S. Gelberg, D. Kolb, and J.L. Weil, Int. J. Mod. Phys. E10, 209, (2001).
  • "Low-lying, excited K = 0 bands on 238U" Z. Gacsi, ...., J. L. Weil, and J. van Klinken, Phys. Rev. C64, 047303 (2001).
  • "Coincidence measurement setup for PGAA and nuclear structure studies", P.P.Ember, T. Belgya, J.L. Weil, and G.L. Molnar, Appl. Radiation and Isotopes 57, 573 (2002).
  • "The cold neutron PGAA-NIPS facility at the Budapest Research Reactor", T. Belgya, Zs. Revay, P.P. Ember, J. Weil, G.L. Molnar and S.M. Qaim, CGS-11 Conference, Pruhonice near Prague, Czech Republic, (2002); World Scientific, New Jersey, London, Singapore, Hong Kong, p. 562, (2003).
  • "Cold neutron PGAA facility at Budapest", Zs. Revay, T. Belgya, Zs. Kasztovsky, J.L. Weil, G.L. Molnar, Nucl. Inst. Meth. B 213, 385 (2004).
  • "Thermal neutron capture cross section measurements of 99Tc at the Budapest PGAA-NIPS facility", T. Belgya, J. Weil, G.L. Molnar, and H.-F. Wirth; Workshop on Neutron Measurement and Evaluation for Applications (NEMEA) Proc., Budapest (2003), EUR Report 21100 EN, p. 159, ISBN 92-894-6041-5, (2004).
  • "A practical test of a gamma-gamma coincidence measurement setup for PGAA", P.P. Ember, T. Belgya, J.L. Weil, and G.L. Molnar; Nucl. Instr. and Meth. in Physics Research, B213, 406 (2004).
  • "Determination of thermal neutron capture cross sections using cold neutron beams", T. Belgya, G.L. Molnar, Zs. Revay and J. Weil, in 10th Int. Conf. on Nuclear Data for Science and Technology, Sept. 26 - Oct. 1, 2004, Santa Fe, New Mexico: AIP, (2005) pp. 744-747.
  • "Three-phonon excitations in 124Sn", D. Bandyopadhyay, N. Warr, C. Fransen, S. W. Yates, J.L. Weil, and M.T. McEllistrem, Nucl. Phys. A747, 206 (2005).
  • "New determination of the 12C(alpha, gamma)16O reaction rate from gamma-ray angular distribution measurements", J.W. Hammer, M. Fey, ... J.L. Weil,..., and S. Szilner; Nucl. Phys. A752, 514C (2005).
  • "E1 and E2 capture cross section and astrophysical reaction rate of the key reaction 12C(alpha, gamma)16O"; J.W. Hammer, M. Fey, ... J.L. Weil...and S. Szilner; Nucl. Phys. A758, 363C (2005).
  • "E1 and E2 S factors of 12C(alpha, gamma)16O from gamma-ray angular distributions with a 4-pi detector array", M. Assuncao, M. Fey ... and J.L. Weil, Phys. Rev. C73, 055801 (2006)
  • "99Tc(n,g)100Tc cross section, 99Tc(d,p)100Tc and the 100Tc decay scheme and neutron binding energy", J. L. Weil, T. Belgya, and H.-F. Wirth, 11th Int. Conf. on Nuclear Data for Science and Technology, Nice, France, 2007: EDP
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