Nuclear level-density parameters of nuclei in the Z{approx}70 and A{approx}180 mid-shell regions

Journal Article · Sun Nov 15 04:00:00 EST 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.054611· OSTI ID:21296505

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

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1. Nuclear Physics Division, Bhabha Atomic Research Centre, Trombay, 400085 Mumbai (India)

{alpha}-particle evaporation energy spectra have been measured as a function of {gamma}-ray fold for various target-projectile systems leading to residual nuclei in the range of Z{approx}70 and A{approx}180 with excitation energy of 30-40 MeV. The inverse level-density parameter K was determined for various nuclei by comparing the high-energy part of the {alpha}-particle evaporation spectra with PACE2 predictions. It is observed that the inverse level-density parameter remains constant for all systems studied in this work within statistical errors in the angular momentum range of 15-30 ({Dirac_h}/2{pi}). The fold-gated {alpha}-particle energy spectra in these systems are well reproduced by the PACE2 code with a level-density parameter value of A/(8.2{+-}1.1) MeV{sup -1}.

• OSTI ID: 21296505
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 80; 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 SPECTRA
ENERGY-LEVEL DENSITY
EVAPORATION
EXCITATION
FORECASTING
GAMMA RADIATION
MEV RANGE 10-100
NUCLEI