Seniority, collectivity, and B(E2) enhancement in Ni-72

C. J. Chiara; W. B. Walters; I. Stefanescu; M. Alcorta; M. P. Carpenter; B. Fornal; G. Guerdal; C. R. Hoffman; R. V. F. Janssens; B. P. Kay; F. G. Kondev; W. Krolas; T. Lauritsen; C. J. Lister; E. A. McCutchan; T. Pawlat; A. M. Rogers; D. Seweryniak; N. Sharp; J. Wrzesinski; S. Zhu

doi:10.1103/PhysRevC.84.037304

Seniority, collectivity, and B(E2) enhancement in Ni-72

C. J. Chiara, W. B. Walters, I. Stefanescu, M. Alcorta, M. P. Carpenter, B. Fornal, G. Guerdal, C. R. Hoffman, R. V. F. Janssens, B. P. Kay, F. G. Kondev, W. Krolas, T. Lauritsen, C. J. Lister, E. A. McCutchan, T. Pawlat, A. M. Rogers, D. Seweryniak, N. Sharp, J. WrzesinskiS. Zhu

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

Abstract

Gamma rays assigned to Ni-72(28)44 have been identified with Gammasphere in deep-inelastic reactions involving a 450-MeV Ge-76 beam and a Pt-198 target. Using a combination of spectra produced by double gates on the known 454-, 843-, and 1095-keV members of the ground-state cascade, a coincident line at 199 keV has been identified and is tentatively assigned as the 8(+) -> 6(+) transition. These gamma-ray coincidences have been observed only in prompt events, indicating an 8(+) half-life below 20 ns and requiring a large B(E2) enhancement compared to that expected from a seniority scheme. This value is consistent with models showing decay to a seniority nu = 4, 6(+) level that is depressed by the same two-body interaction responsible for the rather low 1095-keV 2(1)(+) energy, as compared to the valence-symmetry counterpart Ru-94(44)50.

Original language	English
Article number	037304
Pages (from-to)	-
Number of pages	4
Journal	Physical Review C
Volume	84
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.84.037304
Publication status	Published - 19 Sept 2011

Keywords

COINCIDENCE DATA SETS
ISOTOPES
NUCLEI
STATES
ZR-86

Access to Document

10.1103/PhysRevC.84.037304

Cite this

Chiara, C. J., Walters, W. B., Stefanescu, I., Alcorta, M., Carpenter, M. P., Fornal, B., Guerdal, G., Hoffman, C. R., Janssens, R. V. F., Kay, B. P., Kondev, F. G., Krolas, W., Lauritsen, T., Lister, C. J., McCutchan, E. A., Pawlat, T., Rogers, A. M., Seweryniak, D., Sharp, N., ... Zhu, S. (2011). Seniority, collectivity, and B(E2) enhancement in Ni-72. Physical Review C, 84(3), -. Article 037304. https://doi.org/10.1103/PhysRevC.84.037304

@article{86041d5662744ab3ac53d8a80a10ab94,

title = "Seniority, collectivity, and B(E2) enhancement in Ni-72",

abstract = "Gamma rays assigned to Ni-72(28)44 have been identified with Gammasphere in deep-inelastic reactions involving a 450-MeV Ge-76 beam and a Pt-198 target. Using a combination of spectra produced by double gates on the known 454-, 843-, and 1095-keV members of the ground-state cascade, a coincident line at 199 keV has been identified and is tentatively assigned as the 8(+) -> 6(+) transition. These gamma-ray coincidences have been observed only in prompt events, indicating an 8(+) half-life below 20 ns and requiring a large B(E2) enhancement compared to that expected from a seniority scheme. This value is consistent with models showing decay to a seniority nu = 4, 6(+) level that is depressed by the same two-body interaction responsible for the rather low 1095-keV 2(1)(+) energy, as compared to the valence-symmetry counterpart Ru-94(44)50.",

keywords = "COINCIDENCE DATA SETS, ISOTOPES, NUCLEI, STATES, ZR-86",

author = "Chiara, {C. J.} and Walters, {W. B.} and I. Stefanescu and M. Alcorta and Carpenter, {M. P.} and B. Fornal and G. Guerdal and Hoffman, {C. R.} and Janssens, {R. V. F.} and Kay, {B. P.} and Kondev, {F. G.} and W. Krolas and T. Lauritsen and Lister, {C. J.} and McCutchan, {E. A.} and T. Pawlat and Rogers, {A. M.} and D. Seweryniak and N. Sharp and J. Wrzesinski and S. Zhu",

year = "2011",

month = sep,

day = "19",

doi = "10.1103/PhysRevC.84.037304",

language = "English",

volume = "84",

pages = "--",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "3",

}

Chiara, CJ, Walters, WB, Stefanescu, I, Alcorta, M, Carpenter, MP, Fornal, B, Guerdal, G, Hoffman, CR, Janssens, RVF, Kay, BP, Kondev, FG, Krolas, W, Lauritsen, T, Lister, CJ, McCutchan, EA, Pawlat, T, Rogers, AM, Seweryniak, D, Sharp, N, Wrzesinski, J & Zhu, S 2011, 'Seniority, collectivity, and B(E2) enhancement in Ni-72', Physical Review C, vol. 84, no. 3, 037304, pp. -. https://doi.org/10.1103/PhysRevC.84.037304

TY - JOUR

T1 - Seniority, collectivity, and B(E2) enhancement in Ni-72

AU - Chiara, C. J.

AU - Walters, W. B.

AU - Stefanescu, I.

AU - Alcorta, M.

AU - Carpenter, M. P.

AU - Fornal, B.

AU - Guerdal, G.

AU - Hoffman, C. R.

AU - Janssens, R. V. F.

AU - Kay, B. P.

AU - Kondev, F. G.

AU - Krolas, W.

AU - Lauritsen, T.

AU - Lister, C. J.

AU - McCutchan, E. A.

AU - Pawlat, T.

AU - Rogers, A. M.

AU - Seweryniak, D.

AU - Sharp, N.

AU - Wrzesinski, J.

AU - Zhu, S.

PY - 2011/9/19

Y1 - 2011/9/19

N2 - Gamma rays assigned to Ni-72(28)44 have been identified with Gammasphere in deep-inelastic reactions involving a 450-MeV Ge-76 beam and a Pt-198 target. Using a combination of spectra produced by double gates on the known 454-, 843-, and 1095-keV members of the ground-state cascade, a coincident line at 199 keV has been identified and is tentatively assigned as the 8(+) -> 6(+) transition. These gamma-ray coincidences have been observed only in prompt events, indicating an 8(+) half-life below 20 ns and requiring a large B(E2) enhancement compared to that expected from a seniority scheme. This value is consistent with models showing decay to a seniority nu = 4, 6(+) level that is depressed by the same two-body interaction responsible for the rather low 1095-keV 2(1)(+) energy, as compared to the valence-symmetry counterpart Ru-94(44)50.

AB - Gamma rays assigned to Ni-72(28)44 have been identified with Gammasphere in deep-inelastic reactions involving a 450-MeV Ge-76 beam and a Pt-198 target. Using a combination of spectra produced by double gates on the known 454-, 843-, and 1095-keV members of the ground-state cascade, a coincident line at 199 keV has been identified and is tentatively assigned as the 8(+) -> 6(+) transition. These gamma-ray coincidences have been observed only in prompt events, indicating an 8(+) half-life below 20 ns and requiring a large B(E2) enhancement compared to that expected from a seniority scheme. This value is consistent with models showing decay to a seniority nu = 4, 6(+) level that is depressed by the same two-body interaction responsible for the rather low 1095-keV 2(1)(+) energy, as compared to the valence-symmetry counterpart Ru-94(44)50.

KW - COINCIDENCE DATA SETS

KW - ISOTOPES

KW - NUCLEI

KW - STATES

KW - ZR-86

UR - http://www.scopus.com/inward/record.url?scp=80053068311&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.84.037304

DO - 10.1103/PhysRevC.84.037304

M3 - Article

SN - 2469-9985

VL - 84

SP - -

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 037304

ER -

Seniority, collectivity, and B(E2) enhancement in Ni-72

Abstract

Keywords

Access to Document

Other files and links

Cite this