Zobrazeno 1 - 10
of 398
pro vyhledávání: '"Pittel, S."'
We describe the importance of charge-exchange reactions, and in particular Gamow-Teller transitions, in astrophysical processes and double beta decay, and in understanding of nuclear structure. We first provide an overview of the central role played
Externí odkaz:
http://arxiv.org/abs/2006.08579
We perform a systematic study of Gamow-Teller (GT) transitions in the 2p1f shell, using the nuclear shell model with two schematic Hamiltonians. The use of the shell model provides flexibility to analyze the role of different proton-neutron pairing m
Externí odkaz:
http://arxiv.org/abs/1909.05092
Publikováno v:
Phys. Rev. C 102, 024310 (2020)
We propose a pair-condensate variational approach (PCV) to determine a set of the most important collective pairs in the description of low-lying states in atomic nuclei. Having available the precise details on these key collective pairs -- their spi
Externí odkaz:
http://arxiv.org/abs/1908.07693
Publikováno v:
Phys. Rev. C 93, 034313 (2016)
We study the structure of the number projected BCS (PBCS) wave function in the particle-hole basis, displaying its similarities with coupled clusters theory (CCT). The analysis of PBCS together with several modifications suggested by the CCT wave fun
Externí odkaz:
http://arxiv.org/abs/1603.00642
Publikováno v:
Phys. Rev. C 94, 024301 (2016)
By using the general triaxial rotor model (TRM) and the phonon-configuration mixing scheme within an anharmonic-vibrator(AHV) framework, a series of global correlations between electromagnetic properties of nuclear $2^+_1$ and $2^+_2$ states are anal
Externí odkaz:
http://arxiv.org/abs/1602.08295
Publikováno v:
Phys. Rev. C 92, 024321 (2015)
The electromagnetic features of the $11/2^-$ isomers in the $^{111-127}$Cd isotopes are reproduced by numerically optimized shell-model wave-functions. A sudden phase change of the wave functions at $N = 70$ is identified and further confirmed by the
Externí odkaz:
http://arxiv.org/abs/1406.3814
A study of the shape transition from spherical to axially deformed nuclei in the even Ce isotopes using the nucleon-pair approximation of the shell model is reported. As long as the structure of the dominant collective pairs is determined using a mic
Externí odkaz:
http://arxiv.org/abs/1207.2297
Autor:
Dukelsky, J., Pittel, S.
The exact solution of the BCS pairing Hamiltonian was found by Richardson in 1963. While little attention was paid to this exactly solvable model in the remainder of the 20th century, there was a burst of work at the beginning of this century focusin
Externí odkaz:
http://arxiv.org/abs/1204.2950
A shell-model study of proton-neutron pairing in $2p1f$ shell nuclei using a parametrized hamiltonian that includes deformation and spin-orbit effects as well as isoscalar and isovector pairing is reported. By working in a shell-model framework we ar
Externí odkaz:
http://arxiv.org/abs/1107.3155
A shell-model study of proton-neutron pairing in f - p shell nuclei using a parametrized hamiltonian that includes deformation and spin-orbit effects as well as isoscalar and isovector pairing is reported. By working in a shell-model framework we are
Externí odkaz:
http://arxiv.org/abs/1003.4234