Light-particle evaporation as a function of neutron excess for medium-mass compound nuclei with Ex ˜ 2 MeV/u
Por:
Lou Y., Gonin M., Wada R., Hagel K., Li J., Xiao B., Gui M., Utley D., Tezkratt R., Cooke L., Botting T., Hurst B., O'Kelly D., Mouchaty G., Schmitt R.P., Turmel W., Natowitz J.B., Fabris D., Nebbia G., Viesti G., Ruiz J., Burch B., Gramegna F., Poggi M., Prete G., Brandan M.E., Menchaca-Rocha A.
Publicada:
1 ene 1995
Resumen:
Light-particle emission from the fission reactions of 63Cu + 92,100Mo and 20Ne + 144,148,154Sm has been studied using the Texas A&M Neutron Ball detector. Linearmomentuum transfers (LMT) were determined from fission-fragment-folding-angle measurements. An increase of neutron multiplicity with apparent linear-momentum transfer was seen. The initial excitation energies of the compound nuclei are estimated from the observed linear-momentum transfer and also reconstructed from the measured multiplicities and average energies of neutrons, protons and ?-particles. The results of the two methods are in good agreement. The observed neutron multiplicities show a strong increase with increasing neutron-to-proton ratio of the composite system. The light-particle multiplicities are compared with calculated values using the statistical code GEMINI. The effect of the dynamic fission delay on the total light-particle multiplicities is explored and found to be small. © 1995.
Filiaciones:
Lou Y.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Gonin M.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Wada R.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Hagel K.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Li J.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Xiao B.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Gui M.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Utley D.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Tezkratt R.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Cooke L.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Botting T.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Hurst B.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
O'Kelly D.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Mouchaty G.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Schmitt R.P.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Turmel W.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Natowitz J.B.:
Cyclotron Institute, Texas A and M University, College Station, TX 77843-3366, United States
Fabris D.:
INFN, Universita di Padova, Padova, Italy
Nebbia G.:
INFN, Universita di Padova, Padova, Italy
Viesti G.:
INFN, Universita di Padova, Padova, Italy
Ruiz J.:
INFN, Universita di Padova, Padova, Italy
Burch B.:
INFN, Laboratorio Nazionale Legnaro, I-35020 Legnaro, Italy
Gramegna F.:
INFN, Laboratorio Nazionale Legnaro, I-35020 Legnaro, Italy
Poggi M.:
INFN, Laboratorio Nazionale Legnaro, I-35020 Legnaro, Italy
Prete G.:
INFN, Laboratorio Nazionale Legnaro, I-35020 Legnaro, Italy
Brandan M.E.:
Instituto de Fisica, UNAM, AP20-364, Mexico, 01000 DF, Mexico
Menchaca-Rocha A.:
Instituto de Fisica, UNAM, AP20-364, Mexico, 01000 DF, Mexico
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