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(70)Ge(p,gamma)(71)As and (76)Ge(p,n)(76)As cross sections for the astrophysical p process : Sensitivity of the optical proton potential at low energies
(2007-11)
The cross sections of the (70)Ge(p,gamma)(71)As and (76)Ge(p,n)(76)As reactions have been measured with the activation method in the Gamow window for the astrophysical p process. The experiments were carried out at the Van ...
Measurement of the radiative neutron capture cross section of Pb-206 and its astrophysical implications
(2007-10)
The (n,gamma) cross section of Pb-206 has been measured at the CERN n_TOF facility with high resolution in the energy range from 1 eV to 620 keV by using two optimized C6D6 detectors. In the investigated energy interval ...
Status and outlook of the neutron time-of-flight facility
(2007-08)
The neutron time-of-flight facility n_TOF at CERN, fully operational since 2002, combines a high instantaneous neutron flux with high energy resolution. The wide energy range and the high neutron flux per time-of-flight ...
Neutron reactions and nuclear cosmo-chronology
(Elsevier, 2007-07)
The beta-decay of Re-187 (t(1/2) = 42.3 Gyr) represents a suited cosmo-chronometer for the age of the r-process abundances, since the radiogenic part of the daughter isotope (OS)-O-187 is defined by the difference between ...
Proton capture cross-section of Cd-106,Cd-108 for the astrophysical p-process
(2007-05)
The proton capture cross-sections of the two most proton-rich, stable isotopes of cadmium have been measured for the first time in the energy range relevant to the astrophysical p-process between E-p = 2.4 and 4.7 MeV. The ...
The r-process : Supernovae and other sources of the heaviest elements
(2007-05)
Rapid neutron capture in stellar explosions is responsible for the heaviest elements in nature, up to Th, U and beyond. This nucleosynthesis process, the r-process, is unique in the sense that a combination of nuclear ...
Large-scale prediction of the parity distribution in the nuclear level density and application to astrophysical reaction rates
(2007-04)
A generalized method to calculate the excitation-energy dependent parity ratio in the nuclear level density is presented, using the assumption of Poisson distributed independent quasi particles combined with BCS occupation ...
The La-139(n,gamma) cross section : Key for the onset of the s-process
(2007-03)
The nuclear resonance parameters and the capture cross section of the neutron magic isotope La-139 have been measured relative to Au-197 in the energy range of 0.6 eV to 9 keV at the neutron time-of-flight (n_TOF) facility ...
Comment on "Heavy element production in inhomogeneous big bang nucleosynthesis"
(2007-03)
The work of Matsuura et al. [Phys. Rev. D 72, 123505 (2005)] claims that heavy nuclei could have been produced in a combined p- and r-process in very high baryon density regions of an inhomogeneous big bang. However, they ...
Measurement of the neutron induced fission cross section on transuranic (TRU) elements at the n_TOF facility at CERN
(American Institute of Physics (AIP), 2007)
During the 2004 campaign, the n_TOF collaboration measured neutron fission cross sections for U-233, Am-241,Am-243, Cm-245, as well as the fission standards U-235.238, using a sealed Fission Ionization Chamber (FIC). The ...