Recoil isomer tagging in the proton-rich odd-odd N = 77 isotones, 14265Tb and 14467Ho

C. Scholey; D. M. Cullen; E. S. Paul; A. J. Boston; P. A. Butler; T. Enqvist; C. Fox; H. C. Scraggs; S. L. Shepherd; O. Stezowski; A. M. Bruce; P. M. Walker; M. Caamaño; J. Garcés Narro; M. A. Bentley; D. T. Joss; O. Dorvaux; P. T. Greenlees; K. Helariutta; P. M. Jones; R. Julin; S. Juutinen; H. Kankaanpää; H. Kettunen; P. Kuusiniemi; M. Leino; M. Muikku; P. Nieminen; P. Rahkila; J. Uusitalo

doi:10.1103/PhysRevC.63.034321

Recoil isomer tagging in the proton-rich odd-odd N = 77 isotones, 14265Tb and 14467Ho

C. Scholey, D. M. Cullen, E. S. Paul, A. J. Boston, P. A. Butler, T. Enqvist, C. Fox, H. C. Scraggs, S. L. Shepherd, O. Stezowski, A. M. Bruce, P. M. Walker, M. Caamaño, J. Garcés Narro, M. A. Bentley, D. T. Joss, O. Dorvaux, P. T. Greenlees, K. Helariutta, P. M. JonesR. Julin, S. Juutinen, H. Kankaanpää, H. Kettunen, P. Kuusiniemi, M. Leino, M. Muikku, P. Nieminen, P. Rahkila, J. Uusitalo

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Abstract

A fusion-evaporation reaction has been employed to search for isomeric states in the near-proton drip-line N = 77 isotones, 14265Tb and 14467Ho. The recoiling nuclei were implanted into a silicon detector at the focal plane of a gas-filled separator, where a recoil isomer tagging technique was employed to correlate prompt and delayed γ-ray transitions across isomeric states. New states were observed to be built upon a known 15-μs isomer in 142Tb and the feeding and decay of a new 500(20)-ns isomeric state was established in 144Ho. This measurement represents the first observation of excited states in 144Ho. The behavior of the new states above the isomers suggests that they are built upon low-deformation configurations with significant triaxiality. This is in contrast to the lighter-mass proton emitters that were recently interpreted as being well-deformed, prolate, axially symmetric nuclei.

Original language	English
Pages (from-to)	343211-343219
Number of pages	8
Journal	Physical Review C - Nuclear Physics
Volume	63
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.63.034321
Publication status	Published - Mar 2001

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Scholey, C., Cullen, D. M., Paul, E. S., Boston, A. J., Butler, P. A., Enqvist, T., Fox, C., Scraggs, H. C., Shepherd, S. L., Stezowski, O., Bruce, A. M., Walker, P. M., Caamaño, M., Narro, J. G., Bentley, M. A., Joss, D. T., Dorvaux, O., Greenlees, P. T., Helariutta, K., ... Uusitalo, J. (2001). Recoil isomer tagging in the proton-rich odd-odd N = 77 isotones, 14265Tb and 14467Ho. Physical Review C - Nuclear Physics, 63(3), 343211-343219. https://doi.org/10.1103/PhysRevC.63.034321

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title = "Recoil isomer tagging in the proton-rich odd-odd N = 77 isotones, 14265Tb and 14467Ho",

abstract = "A fusion-evaporation reaction has been employed to search for isomeric states in the near-proton drip-line N = 77 isotones, 14265Tb and 14467Ho. The recoiling nuclei were implanted into a silicon detector at the focal plane of a gas-filled separator, where a recoil isomer tagging technique was employed to correlate prompt and delayed γ-ray transitions across isomeric states. New states were observed to be built upon a known 15-μs isomer in 142Tb and the feeding and decay of a new 500(20)-ns isomeric state was established in 144Ho. This measurement represents the first observation of excited states in 144Ho. The behavior of the new states above the isomers suggests that they are built upon low-deformation configurations with significant triaxiality. This is in contrast to the lighter-mass proton emitters that were recently interpreted as being well-deformed, prolate, axially symmetric nuclei.",

author = "C. Scholey and Cullen, {D. M.} and Paul, {E. S.} and Boston, {A. J.} and Butler, {P. A.} and T. Enqvist and C. Fox and Scraggs, {H. C.} and Shepherd, {S. L.} and O. Stezowski and Bruce, {A. M.} and Walker, {P. M.} and M. Caama{\~n}o and Narro, {J. Garc{\'e}s} and Bentley, {M. A.} and Joss, {D. T.} and O. Dorvaux and Greenlees, {P. T.} and K. Helariutta and Jones, {P. M.} and R. Julin and S. Juutinen and H. Kankaanp{\"a}{\"a} and H. Kettunen and P. Kuusiniemi and M. Leino and M. Muikku and P. Nieminen and P. Rahkila and J. Uusitalo",

year = "2001",

month = mar,

doi = "10.1103/PhysRevC.63.034321",

language = "English",

volume = "63",

pages = "343211--343219",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "3",

}

Scholey, C, Cullen, DM, Paul, ES, Boston, AJ, Butler, PA, Enqvist, T, Fox, C, Scraggs, HC, Shepherd, SL, Stezowski, O, Bruce, AM, Walker, PM, Caamaño, M, Narro, JG, Bentley, MA, Joss, DT, Dorvaux, O, Greenlees, PT, Helariutta, K, Jones, PM, Julin, R, Juutinen, S, Kankaanpää, H, Kettunen, H, Kuusiniemi, P, Leino, M, Muikku, M, Nieminen, P, Rahkila, P & Uusitalo, J 2001, 'Recoil isomer tagging in the proton-rich odd-odd N = 77 isotones, 14265Tb and 14467Ho', Physical Review C - Nuclear Physics, vol. 63, no. 3, pp. 343211-343219. https://doi.org/10.1103/PhysRevC.63.034321

TY - JOUR

T1 - Recoil isomer tagging in the proton-rich odd-odd N = 77 isotones, 14265Tb and 14467Ho

AU - Scholey, C.

AU - Cullen, D. M.

AU - Paul, E. S.

AU - Boston, A. J.

AU - Butler, P. A.

AU - Enqvist, T.

AU - Fox, C.

AU - Scraggs, H. C.

AU - Shepherd, S. L.

AU - Stezowski, O.

AU - Bruce, A. M.

AU - Walker, P. M.

AU - Caamaño, M.

AU - Narro, J. Garcés

AU - Bentley, M. A.

AU - Joss, D. T.

AU - Dorvaux, O.

AU - Greenlees, P. T.

AU - Helariutta, K.

AU - Jones, P. M.

AU - Julin, R.

AU - Juutinen, S.

AU - Kankaanpää, H.

AU - Kettunen, H.

AU - Kuusiniemi, P.

AU - Leino, M.

AU - Muikku, M.

AU - Nieminen, P.

AU - Rahkila, P.

AU - Uusitalo, J.

PY - 2001/3

Y1 - 2001/3

N2 - A fusion-evaporation reaction has been employed to search for isomeric states in the near-proton drip-line N = 77 isotones, 14265Tb and 14467Ho. The recoiling nuclei were implanted into a silicon detector at the focal plane of a gas-filled separator, where a recoil isomer tagging technique was employed to correlate prompt and delayed γ-ray transitions across isomeric states. New states were observed to be built upon a known 15-μs isomer in 142Tb and the feeding and decay of a new 500(20)-ns isomeric state was established in 144Ho. This measurement represents the first observation of excited states in 144Ho. The behavior of the new states above the isomers suggests that they are built upon low-deformation configurations with significant triaxiality. This is in contrast to the lighter-mass proton emitters that were recently interpreted as being well-deformed, prolate, axially symmetric nuclei.

AB - A fusion-evaporation reaction has been employed to search for isomeric states in the near-proton drip-line N = 77 isotones, 14265Tb and 14467Ho. The recoiling nuclei were implanted into a silicon detector at the focal plane of a gas-filled separator, where a recoil isomer tagging technique was employed to correlate prompt and delayed γ-ray transitions across isomeric states. New states were observed to be built upon a known 15-μs isomer in 142Tb and the feeding and decay of a new 500(20)-ns isomeric state was established in 144Ho. This measurement represents the first observation of excited states in 144Ho. The behavior of the new states above the isomers suggests that they are built upon low-deformation configurations with significant triaxiality. This is in contrast to the lighter-mass proton emitters that were recently interpreted as being well-deformed, prolate, axially symmetric nuclei.

U2 - 10.1103/PhysRevC.63.034321

DO - 10.1103/PhysRevC.63.034321

M3 - Article

SN - 0556-2813

VL - 63

SP - 343211

EP - 343219

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 3

ER -

Recoil isomer tagging in the proton-rich odd-odd N = 77 isotones, 14265Tb and 14467Ho

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