TY - JOUR
T1 - High-performance algorithm for calculating non-spurious spin- and parity-dependent nuclear level densities
AU - Sen'kov, R. A.
AU - Horoi, M.
AU - Zelevinsky, V. G.
N1 - Funding Information:
R.S. and M.H. would like to acknowledge the DOE UNEDF grant No. DE-FC02-09ER41584 for support. M.H. and V.Z. acknowledge support from the NSF grants No. PHY-0758099 and PHY-1068217 .
PY - 2011/8/26
Y1 - 2011/8/26
N2 - A new high-performance algorithm for calculating the spin- and parity-dependent shell model nuclear level densities using methods of statistical spectroscopy in the proton-neutron formalism was recently proposed. When used in valence spaces that cover more than one major harmonic oscillator shell, this algorithm mixes the genuine intrinsic states with spurious center-of-mass excitations. In this Letter we present an advanced algorithm, based on the recently proposed statistical moments method, that eliminates the spurious states. Results for unnatural parity states of several sd-shell nuclei are presented and compared with those of exact shell model calculations and experimental data.
AB - A new high-performance algorithm for calculating the spin- and parity-dependent shell model nuclear level densities using methods of statistical spectroscopy in the proton-neutron formalism was recently proposed. When used in valence spaces that cover more than one major harmonic oscillator shell, this algorithm mixes the genuine intrinsic states with spurious center-of-mass excitations. In this Letter we present an advanced algorithm, based on the recently proposed statistical moments method, that eliminates the spurious states. Results for unnatural parity states of several sd-shell nuclei are presented and compared with those of exact shell model calculations and experimental data.
KW - Center-of-mass motion
KW - Level density
KW - Moments method
KW - Spurious states
KW - Statistical spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=80051570982&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2011.07.004
DO - 10.1016/j.physletb.2011.07.004
M3 - Article
AN - SCOPUS:80051570982
SN - 0370-2693
VL - 702
SP - 413
EP - 418
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 5
ER -