Zobrazeno 1 - 10
of 229
pro vyhledávání: '"MELBY, E."'
Publikováno v:
J.Phys.G29:263-278,2003
A method to extract simultaneously level densities and $\gamma$-ray transmission coefficients has for the first time been tested on light nuclei utilizing the $^{28}$Si($^3$He,$\alpha\gamma)^{27}$Si and $^{28}$Si($^3$He,$^3$He'$\gamma)^{28}$Si reacti
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0203013
Publikováno v:
Phys.Rev. C65 (2002) 044318
The level densities and $\gamma$-strength functions of the weakly deformed $^{148}$Sm and $^{149}$Sm nuclei have been extracted. The temperature versus excitation energy curve, derived within the framework of the micro canonical ensemble, shows struc
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0111012
Publikováno v:
Phys.Rev. C64 (2001) 034319
A simple model based on the canonical-ensemble theory is outlined for hot nuclei. The properties of the model are discussed with respect to the Fermi gas model and the breaking of Cooper pairs. The model describes well the experimental level density
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0104029
The experimental resonance parameters of the pygmy resonance in rare earth nuclei are compared to global parameters of the scissors-mode states. It is argued that the pygmy resonance in rare earth nuclei can be described in terms of orbital M1 streng
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0011018
Publikováno v:
Phys.Rev. C63 (2001) 044309
The primary gamma-ray spectra of 166-Er and 167-Er are deduced from the (3-He,alpha gamma) and (3-He,3-He' gamma) reaction, respectively, enabling a simultaneous extraction of the level density and the gamma-ray strength function. Entropy, temperatur
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0010019
Publikováno v:
Phys.Rev. C63 (2001) 044313
The gamma-ray strength function for gamma energies in the 1-7 MeV region has been measured for 161,162-Dy and 171,172-Yb using the (3-He,alpha gamma) reaction. Various models are tested against the observed gamma-ray strength functions. The best desc
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0009018
Publikováno v:
Phys. Rev. C63, 044301 (2001)
Information on level density for nuclei with mass numbers A = 20 - 250 is deduced from discrete low-lying levels and neutron resonance data. The odd-mass nuclei exhibit in general 4 - 7 times the level density found for its neighboring even-even nucl
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0008016
Publikováno v:
Phys.Atom.Nucl. 64 (2001) 1186; Yad.Fiz. 64 (2001) 1263
A convergent method to extract the nuclear level density and the gamma-ray strength function from primary gamma-ray spectra has been established. Thermodynamical quantities have been obtained within the microcanonical and canonical ensemble theory. S
Externí odkaz:
http://arxiv.org/abs/nucl-ex/0007009
Publikováno v:
Phys.Rev. C61 (2000) 044324
Complementary measurements have been performed for the level density and gamma strength function in 162-Dy using inelastic 3-He scattering. Comparing these results to previous measurements using the 163-Dy(3-He,alpha) reaction, reveals that the measu
Externí odkaz:
http://arxiv.org/abs/nucl-ex/9912002
Autor:
Guttormsen, M., Bjerve, A., Hjorth-Jensen, M., Melby, E., Rekstad, J., Schiller, A., Siem, S., Belic, A.
Publikováno v:
Phys.Rev. C62 (2000) 024306
The density of accessible levels at low spin in the (^3He,\alpha \gamma) reaction has been extracted for the ^{161,162}Dy and ^{171,172}Yb nuclei. The entropy of the even-odd and even-even nuclei has been deduced as a function of excitation energy, a
Externí odkaz:
http://arxiv.org/abs/nucl-ex/9911011