Lifetime measurements in the odd-A nucleus Hf 177

L. Knafla; P. Alexa; U. Köster; G. Thiamova; J. M. Régis; J. Jolie; A. Blanc; A. M. Bruce; A. Esmaylzadeh; L. M. Fraile; G. De France; G. Häfner; S. Ilieva; M. Jentschel; V. Karayonchev; W. Korten; T. Kröll; S. Lalkovski; S. Leoni; H. Mach; N. Mǎrginean; P. Mutti; G. Pascovici; V. Paziy; Zs Podolyák; P. H. Regan; O. J. Roberts; N. Saed-Samii; G. S. Simpson; T. Soldner; C. Townsley; C. A. Ur; W. Urban; A. Vancraeyenest; N. Warr

doi:10.1103/PhysRevC.102.054322

Lifetime measurements in the odd-A nucleus Hf 177

L. Knafla, P. Alexa, U. Köster, G. Thiamova, J. M. Régis, J. Jolie, A. Blanc, A. M. Bruce, A. Esmaylzadeh, L. M. Fraile, G. De France, G. Häfner, S. Ilieva, M. Jentschel, V. Karayonchev, W. Korten, T. Kröll, S. Lalkovski, S. Leoni, H. MachN. Mǎrginean, P. Mutti, G. Pascovici, V. Paziy, Zs Podolyák, P. H. Regan, O. J. Roberts, N. Saed-Samii, G. S. Simpson, T. Soldner, C. Townsley, C. A. Ur, W. Urban, A. Vancraeyenest, N. Warr

University of Brighton

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

Abstract

Lifetimes of low- and high-spin states in the odd-A nucleus Hf177 were measured during the EXILL&FATIMA campaign using a spectrometer equipped with eight HPGe-Clover detectors and 16 fast-timing LaBr3(Ce) detectors. For the determination of lifetimes in the pico- to nanosecond regime, the well-established generalized centroid difference method was used. Lifetimes of the 9/2-, 9/2+, 11/2-, 11/2+ states were remeasured, the lifetimes of the 13/2-, 17/2-, 13/2+, 15/2+, and 17/2+ states were determined for the first time and an upper limit for the 19/2+ state has been established. From these lifetimes absolute reduced transition probabilities were extracted and compared to particle-rotor-model calculations and quasiparticle-phonon-model calculations showing the importance of including multipole-multipole interactions in the description of odd-A nuclei in the rare earth region.

Original language	English
Article number	054322
Journal	Physical Review C
Volume	102
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.102.054322
Publication status	Published - 16 Nov 2020

Bibliographical note

Funding Information:
The EXILL&FATIMA campaign would not have been possible without the support of several services at the ILL and the LPSC of Grenoble. We are grateful to the EXOGAM collaboration for the loan of the detectors and to GANIL for assistance during installation and dismantling of the array. We are also grateful for the provision of high-quality fast-timing equipment by the FATIMA collaboration. We thank the team of the FRM2 reactor (Garching, Bavaria) for the irradiation producing the source and Mark Harfensteller and Richard Henkelmann (ITG Garching) for the organization of the irradiation and shipment. This work was supported by the German BMBF under Grant No. 05P19PKFNA; the Spanish government through Grant No. RTI2018-098868-B-I00 and the STFC(UK). P.A. acknowledges the financial support by Project No. SP2020/45.

Publisher Copyright:
© 2020 American Physical Society.

Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.

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10.1103/PhysRevC.102.054322

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Knafla, L., Alexa, P., Köster, U., Thiamova, G., Régis, J. M., Jolie, J., Blanc, A., Bruce, A. M., Esmaylzadeh, A., Fraile, L. M., De France, G., Häfner, G., Ilieva, S., Jentschel, M., Karayonchev, V., Korten, W., Kröll, T., Lalkovski, S., Leoni, S., ... Warr, N. (2020). Lifetime measurements in the odd-A nucleus Hf 177. Physical Review C, 102(5), Article 054322. https://doi.org/10.1103/PhysRevC.102.054322

@article{11ca07290af24c93b4f3b6a034d78564,

title = "Lifetime measurements in the odd-A nucleus Hf 177",

abstract = "Lifetimes of low- and high-spin states in the odd-A nucleus Hf177 were measured during the EXILL&FATIMA campaign using a spectrometer equipped with eight HPGe-Clover detectors and 16 fast-timing LaBr3(Ce) detectors. For the determination of lifetimes in the pico- to nanosecond regime, the well-established generalized centroid difference method was used. Lifetimes of the 9/2-, 9/2+, 11/2-, 11/2+ states were remeasured, the lifetimes of the 13/2-, 17/2-, 13/2+, 15/2+, and 17/2+ states were determined for the first time and an upper limit for the 19/2+ state has been established. From these lifetimes absolute reduced transition probabilities were extracted and compared to particle-rotor-model calculations and quasiparticle-phonon-model calculations showing the importance of including multipole-multipole interactions in the description of odd-A nuclei in the rare earth region.",

author = "L. Knafla and P. Alexa and U. K{\"o}ster and G. Thiamova and R{\'e}gis, {J. M.} and J. Jolie and A. Blanc and Bruce, {A. M.} and A. Esmaylzadeh and Fraile, {L. M.} and {De France}, G. and G. H{\"a}fner and S. Ilieva and M. Jentschel and V. Karayonchev and W. Korten and T. Kr{\"o}ll and S. Lalkovski and S. Leoni and H. Mach and N. Mǎrginean and P. Mutti and G. Pascovici and V. Paziy and Zs Podoly{\'a}k and Regan, {P. H.} and Roberts, {O. J.} and N. Saed-Samii and Simpson, {G. S.} and T. Soldner and C. Townsley and Ur, {C. A.} and W. Urban and A. Vancraeyenest and N. Warr",

note = "Funding Information: The EXILL&FATIMA campaign would not have been possible without the support of several services at the ILL and the LPSC of Grenoble. We are grateful to the EXOGAM collaboration for the loan of the detectors and to GANIL for assistance during installation and dismantling of the array. We are also grateful for the provision of high-quality fast-timing equipment by the FATIMA collaboration. We thank the team of the FRM2 reactor (Garching, Bavaria) for the irradiation producing the source and Mark Harfensteller and Richard Henkelmann (ITG Garching) for the organization of the irradiation and shipment. This work was supported by the German BMBF under Grant No. 05P19PKFNA; the Spanish government through Grant No. RTI2018-098868-B-I00 and the STFC(UK). P.A. acknowledges the financial support by Project No. SP2020/45. Publisher Copyright: {\textcopyright} 2020 American Physical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = nov,

day = "16",

doi = "10.1103/PhysRevC.102.054322",

language = "English",

volume = "102",

journal = "Physical Review C",

issn = "2469-9985",

number = "5",

}

Knafla, L, Alexa, P, Köster, U, Thiamova, G, Régis, JM, Jolie, J, Blanc, A, Bruce, AM, Esmaylzadeh, A, Fraile, LM, De France, G, Häfner, G, Ilieva, S, Jentschel, M, Karayonchev, V, Korten, W, Kröll, T, Lalkovski, S, Leoni, S, Mach, H, Mǎrginean, N, Mutti, P, Pascovici, G, Paziy, V, Podolyák, Z, Regan, PH, Roberts, OJ, Saed-Samii, N, Simpson, GS, Soldner, T, Townsley, C, Ur, CA, Urban, W, Vancraeyenest, A & Warr, N 2020, 'Lifetime measurements in the odd-A nucleus Hf 177', Physical Review C, vol. 102, no. 5, 054322. https://doi.org/10.1103/PhysRevC.102.054322

TY - JOUR

T1 - Lifetime measurements in the odd-A nucleus Hf 177

AU - Knafla, L.

AU - Alexa, P.

AU - Köster, U.

AU - Thiamova, G.

AU - Régis, J. M.

AU - Jolie, J.

AU - Blanc, A.

AU - Bruce, A. M.

AU - Esmaylzadeh, A.

AU - Fraile, L. M.

AU - De France, G.

AU - Häfner, G.

AU - Ilieva, S.

AU - Jentschel, M.

AU - Karayonchev, V.

AU - Korten, W.

AU - Kröll, T.

AU - Lalkovski, S.

AU - Leoni, S.

AU - Mach, H.

AU - Mǎrginean, N.

AU - Mutti, P.

AU - Pascovici, G.

AU - Paziy, V.

AU - Podolyák, Zs

AU - Regan, P. H.

AU - Roberts, O. J.

AU - Saed-Samii, N.

AU - Simpson, G. S.

AU - Soldner, T.

AU - Townsley, C.

AU - Ur, C. A.

AU - Urban, W.

AU - Vancraeyenest, A.

AU - Warr, N.

N1 - Funding Information: The EXILL&FATIMA campaign would not have been possible without the support of several services at the ILL and the LPSC of Grenoble. We are grateful to the EXOGAM collaboration for the loan of the detectors and to GANIL for assistance during installation and dismantling of the array. We are also grateful for the provision of high-quality fast-timing equipment by the FATIMA collaboration. We thank the team of the FRM2 reactor (Garching, Bavaria) for the irradiation producing the source and Mark Harfensteller and Richard Henkelmann (ITG Garching) for the organization of the irradiation and shipment. This work was supported by the German BMBF under Grant No. 05P19PKFNA; the Spanish government through Grant No. RTI2018-098868-B-I00 and the STFC(UK). P.A. acknowledges the financial support by Project No. SP2020/45. Publisher Copyright: © 2020 American Physical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/11/16

Y1 - 2020/11/16

N2 - Lifetimes of low- and high-spin states in the odd-A nucleus Hf177 were measured during the EXILL&FATIMA campaign using a spectrometer equipped with eight HPGe-Clover detectors and 16 fast-timing LaBr3(Ce) detectors. For the determination of lifetimes in the pico- to nanosecond regime, the well-established generalized centroid difference method was used. Lifetimes of the 9/2-, 9/2+, 11/2-, 11/2+ states were remeasured, the lifetimes of the 13/2-, 17/2-, 13/2+, 15/2+, and 17/2+ states were determined for the first time and an upper limit for the 19/2+ state has been established. From these lifetimes absolute reduced transition probabilities were extracted and compared to particle-rotor-model calculations and quasiparticle-phonon-model calculations showing the importance of including multipole-multipole interactions in the description of odd-A nuclei in the rare earth region.

AB - Lifetimes of low- and high-spin states in the odd-A nucleus Hf177 were measured during the EXILL&FATIMA campaign using a spectrometer equipped with eight HPGe-Clover detectors and 16 fast-timing LaBr3(Ce) detectors. For the determination of lifetimes in the pico- to nanosecond regime, the well-established generalized centroid difference method was used. Lifetimes of the 9/2-, 9/2+, 11/2-, 11/2+ states were remeasured, the lifetimes of the 13/2-, 17/2-, 13/2+, 15/2+, and 17/2+ states were determined for the first time and an upper limit for the 19/2+ state has been established. From these lifetimes absolute reduced transition probabilities were extracted and compared to particle-rotor-model calculations and quasiparticle-phonon-model calculations showing the importance of including multipole-multipole interactions in the description of odd-A nuclei in the rare earth region.

UR - http://www.scopus.com/inward/record.url?scp=85097130017&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.102.054322

DO - 10.1103/PhysRevC.102.054322

M3 - Article

AN - SCOPUS:85097130017

SN - 2469-9985

VL - 102

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - 054322

ER -

Lifetime measurements in the odd-A nucleus Hf 177

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Bibliographical note

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