Level densities and thermodynamical properties of Pt and Au isotopes

F. Giacoppo; F. L. Bello Garrote; L. A. Bernstein; D. L. Bleuel; T. K. Eriksen; R. B. Firestone; A. Görgen; M. Guttormsen; T. W. Hagen; B. V. Kheswa; M. Klintefjord; P. E. Koehler; A. C. Larsen; H. T. Nyhus; T. Renstrøm; E. Sahin; S. Siem; T. Tornyi

doi:10.1103/PhysRevC.90.054330

Level densities and thermodynamical properties of Pt and Au isotopes

F. Giacoppo, F. L. Bello Garrote, L. A. Bernstein, D. L. Bleuel, T. K. Eriksen, R. B. Firestone, A. Görgen, M. Guttormsen, T. W. Hagen, B. V. Kheswa, M. Klintefjord, P. E. Koehler, A. C. Larsen, H. T. Nyhus, T. Renstrøm, E. Sahin, S. Siem, T. Tornyi

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

The nuclear level densities of Pt194-196 and Au197,198 below the neutron separation energy have been measured using transfer and scattering reactions. All the level density distributions follow the constant-temperature description. Each group of isotopes is characterized by the same temperature above the energy threshold corresponding to the breaking of the first Cooper pair. A constant entropy excess ΔS=1.9kB and 1.1kB is observed in Pt195 and Au198 with respect to Pt196 and Au197, respectively, giving information on the available single-particle level space for the last unpaired valence neutron. The breaking of nucleon Cooper pairs is revealed by sequential peaks in the microcanonical caloric curve.

Original language	English
Article number	054330
Journal	Physical Review C - Nuclear Physics
Volume	90
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.90.054330
Publication status	Published - 20 Nov 2014
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.90.054330

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Giacoppo, F., Bello Garrote, F. L., Bernstein, L. A., Bleuel, D. L., Eriksen, T. K., Firestone, R. B., Görgen, A., Guttormsen, M., Hagen, T. W., Kheswa, B. V., Klintefjord, M., Koehler, P. E., Larsen, A. C., Nyhus, H. T., Renstrøm, T., Sahin, E., Siem, S., & Tornyi, T. (2014). Level densities and thermodynamical properties of Pt and Au isotopes. Physical Review C - Nuclear Physics, 90(5), Article 054330. https://doi.org/10.1103/PhysRevC.90.054330

@article{48a8b6ef24134156975761d01458aadd,

title = "Level densities and thermodynamical properties of Pt and Au isotopes",

abstract = "The nuclear level densities of Pt194-196 and Au197,198 below the neutron separation energy have been measured using transfer and scattering reactions. All the level density distributions follow the constant-temperature description. Each group of isotopes is characterized by the same temperature above the energy threshold corresponding to the breaking of the first Cooper pair. A constant entropy excess ΔS=1.9kB and 1.1kB is observed in Pt195 and Au198 with respect to Pt196 and Au197, respectively, giving information on the available single-particle level space for the last unpaired valence neutron. The breaking of nucleon Cooper pairs is revealed by sequential peaks in the microcanonical caloric curve.",

author = "F. Giacoppo and {Bello Garrote}, {F. L.} and Bernstein, {L. A.} and Bleuel, {D. L.} and Eriksen, {T. K.} and Firestone, {R. B.} and A. G{\"o}rgen and M. Guttormsen and Hagen, {T. W.} and Kheswa, {B. V.} and M. Klintefjord and Koehler, {P. E.} and Larsen, {A. C.} and Nyhus, {H. T.} and T. Renstr{\o}m and E. Sahin and S. Siem and T. Tornyi",

note = "Publisher Copyright: {\textcopyright} 2014 American Physical Society.",

year = "2014",

month = nov,

day = "20",

doi = "10.1103/PhysRevC.90.054330",

language = "English",

volume = "90",

journal = "Physical Review C - Nuclear Physics",

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Giacoppo, F, Bello Garrote, FL, Bernstein, LA, Bleuel, DL, Eriksen, TK, Firestone, RB, Görgen, A, Guttormsen, M, Hagen, TW, Kheswa, BV, Klintefjord, M, Koehler, PE, Larsen, AC, Nyhus, HT, Renstrøm, T, Sahin, E, Siem, S & Tornyi, T 2014, 'Level densities and thermodynamical properties of Pt and Au isotopes', Physical Review C - Nuclear Physics, vol. 90, no. 5, 054330. https://doi.org/10.1103/PhysRevC.90.054330

TY - JOUR

T1 - Level densities and thermodynamical properties of Pt and Au isotopes

AU - Giacoppo, F.

AU - Bello Garrote, F. L.

AU - Bernstein, L. A.

AU - Bleuel, D. L.

AU - Eriksen, T. K.

AU - Firestone, R. B.

AU - Görgen, A.

AU - Guttormsen, M.

AU - Hagen, T. W.

AU - Kheswa, B. V.

AU - Klintefjord, M.

AU - Koehler, P. E.

AU - Larsen, A. C.

AU - Nyhus, H. T.

AU - Renstrøm, T.

AU - Sahin, E.

AU - Siem, S.

AU - Tornyi, T.

PY - 2014/11/20

Y1 - 2014/11/20

N2 - The nuclear level densities of Pt194-196 and Au197,198 below the neutron separation energy have been measured using transfer and scattering reactions. All the level density distributions follow the constant-temperature description. Each group of isotopes is characterized by the same temperature above the energy threshold corresponding to the breaking of the first Cooper pair. A constant entropy excess ΔS=1.9kB and 1.1kB is observed in Pt195 and Au198 with respect to Pt196 and Au197, respectively, giving information on the available single-particle level space for the last unpaired valence neutron. The breaking of nucleon Cooper pairs is revealed by sequential peaks in the microcanonical caloric curve.

AB - The nuclear level densities of Pt194-196 and Au197,198 below the neutron separation energy have been measured using transfer and scattering reactions. All the level density distributions follow the constant-temperature description. Each group of isotopes is characterized by the same temperature above the energy threshold corresponding to the breaking of the first Cooper pair. A constant entropy excess ΔS=1.9kB and 1.1kB is observed in Pt195 and Au198 with respect to Pt196 and Au197, respectively, giving information on the available single-particle level space for the last unpaired valence neutron. The breaking of nucleon Cooper pairs is revealed by sequential peaks in the microcanonical caloric curve.

UR - http://www.scopus.com/inward/record.url?scp=84913555649&partnerID=8YFLogxK

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DO - 10.1103/PhysRevC.90.054330

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VL - 90

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 5

M1 - 054330

ER -

Level densities and thermodynamical properties of Pt and Au isotopes

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