Angular momentum dependence of the nuclear level-density parameter around Z{approx}50

Journal Article · Sat Nov 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.78.054609· OSTI ID:21199381

Gupta, Y K; John, Bency; Biswas, D C; Nayak, B K; Saxena, A; Choudhury, R K ^[1]

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1. Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)

{alpha}-particle evaporation spectra and {gamma}-ray multiplicities were measured for various target-projectile systems corresponding to residual nuclei in the range of Z{sub R}=48-55 and with excitation energy in the range of 30-40 MeV. The high-energy part of the evaporation spectra were analyzed using the statistical model code PACE2 to derive values of the inverse level-density parameter (K). The K values were found to be in the range of 9.0-10.5 for all systems. Angular momentum dependence of the inverse level-density parameter was investigated using the {gamma}-ray multiplicity data. It is seen that there are strong variations in K as a function of angular momentum for many systems. Present results provide important input information for a systematic understanding of the statistical properties of nuclei at moderate excitation energies and angular momenta.

• OSTI ID: 21199381
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 78; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ANGULAR MOMENTUM
ATOMIC NUMBER
ENERGY-LEVEL DENSITY
EVAPORATION
EXCITATION
GAMMA RADIATION
MEV RANGE 10-100
MULTIPLICITY
NUCLEI
SPECTRA
STATISTICAL MODELS
VARIATIONS