Lifetime measurements in the odd-A nucleus 177Hf

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; J. F. Smith; 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 ¹⁷⁷Hf

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, J. F. Smith, T. Soldner, C. Townsley, C. A. Ur, W. Urban, A. Vancraeyenest, N. Warr

School of Computing, Engineering and Physical Sciences

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Abstract

Lifetimes of low- and high-spin states in the odd-A nucleus 177Hf 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

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2020 10 21 Knafla et al Lifetime acceptedAccepted author manuscript, 518 KB

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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 ¹⁷⁷Hf. Physical Review C, 102(5), Article 054322. https://doi.org/10.1103/PhysRevC.102.054322

@article{d51ec428b3fc4b859b8e346e9d61a2d8,

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

abstract = "Lifetimes of low- and high-spin states in the odd-A nucleus 177Hf 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 J.-M. R{\'e}gis and J. Jolie and A. Blanc and Bruce, {A. M.} and A. Esmaylzadeh and L.M. Fraile 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 P.H. Regan and Roberts, {O. J.} and N. Saed-Samii and Simpson, {G. S.} and Smith, {J. F.} and T. Soldner and C. Townsley and Ur, {C. A.} and W. Urban and A. Vancraeyenest and N. Warr",

year = "2020",

month = nov,

day = "16",

doi = "10.1103/PhysRevC.102.054322",

language = "English",

volume = "102",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "5",

}

Knafla, L, Alexa, P, Köster, U, Thiamova, G, Régis, J-M, 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, Smith, JF, Soldner, T, Townsley, C, Ur, CA, Urban, W, Vancraeyenest, A & Warr, N 2020, 'Lifetime measurements in the odd-A nucleus ¹⁷⁷Hf', 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 177Hf

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 - Smith, J. F.

AU - Soldner, T.

AU - Townsley, C.

AU - Ur, C. A.

AU - Urban, W.

AU - Vancraeyenest, A.

AU - Warr, N.

PY - 2020/11/16

Y1 - 2020/11/16

N2 - Lifetimes of low- and high-spin states in the odd-A nucleus 177Hf 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 177Hf 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.

U2 - 10.1103/PhysRevC.102.054322

DO - 10.1103/PhysRevC.102.054322

M3 - Article

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 177Hf

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Lifetime measurements in the odd-A nucleus ¹⁷⁷Hf