Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements

M. W. Reed; I. J. Cullen; P. M. Walker; Yu. A. Litvinov; K. Blaum; F. Bosch; C. Brandau; J. J. Carroll; D. M. Cullen; A. Y. Deo; B. Detwiller; C. Dimopoulou; G. D. Dracoulis; F. Farinon; H. Geissel; E. Haettner; M. Heil; R. S. Kempley; R. Knoebel; C. Kozhuharov; J. Kurcewicz; N. Kuzminchuk; S. Litvinov; Z. Liu; R. Mao; C. Nociforo; F. Nolden; W. R. Plass; A. Prochazka; C. Scheidenberger; M. Steck; Th. Stoehlker; B. Sun; T. P. D. Swan; G. Trees; H. Weick; N. Winckler; M. Winkler; P. J. Woods; T. Yamaguchi

doi:10.1103/PhysRevLett.105.172501

Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements

M. W. Reed, I. J. Cullen, P. M. Walker, Yu. A. Litvinov, K. Blaum, F. Bosch, C. Brandau, J. J. Carroll, D. M. Cullen, A. Y. Deo, B. Detwiller, C. Dimopoulou, G. D. Dracoulis, F. Farinon, H. Geissel, E. Haettner, M. Heil, R. S. Kempley, R. Knoebel, C. KozhuharovJ. Kurcewicz, N. Kuzminchuk, S. Litvinov, Z. Liu, R. Mao, C. Nociforo, F. Nolden, W. R. Plass, A. Prochazka, C. Scheidenberger, M. Steck, Th. Stoehlker, B. Sun, T. P. D. Swan, G. Trees, H. Weick, N. Winckler, M. Winkler, P. J. Woods, T. Yamaguchi

School of Physics and Astronomy

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Abstract

A study of cooled Au-197 projectile-fragmentation products has been performed with a storage ring. This has enabled metastable nuclear excitations with energies up to 3 MeV, and half-lives extending to minutes or longer, to be identified in the neutron-rich nuclides Hf-183,Hf-184,Hf-186 and Ta-186,Ta-187. The results support the prediction of a strongly favored isomer region near neutron number 116.

Original language	English
Article number	172501
Pages (from-to)	-
Number of pages	5
Journal	Physical Review Letters
Volume	105
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.105.172501
Publication status	Published - 18 Oct 2010

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10.1103/PhysRevLett.105.172501

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Reed, M. W., Cullen, I. J., Walker, P. M., Litvinov, Y. A., Blaum, K., Bosch, F., Brandau, C., Carroll, J. J., Cullen, D. M., Deo, A. Y., Detwiller, B., Dimopoulou, C., Dracoulis, G. D., Farinon, F., Geissel, H., Haettner, E., Heil, M., Kempley, R. S., Knoebel, R., ... Yamaguchi, T. (2010). Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements. Physical Review Letters, 105(17), -. Article 172501. https://doi.org/10.1103/PhysRevLett.105.172501

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title = "Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements",

abstract = "A study of cooled Au-197 projectile-fragmentation products has been performed with a storage ring. This has enabled metastable nuclear excitations with energies up to 3 MeV, and half-lives extending to minutes or longer, to be identified in the neutron-rich nuclides Hf-183,Hf-184,Hf-186 and Ta-186,Ta-187. The results support the prediction of a strongly favored isomer region near neutron number 116.",

author = "Reed, {M. W.} and Cullen, {I. J.} and Walker, {P. M.} and Litvinov, {Yu. A.} and K. Blaum and F. Bosch and C. Brandau and Carroll, {J. J.} and Cullen, {D. M.} and Deo, {A. Y.} and B. Detwiller and C. Dimopoulou and Dracoulis, {G. D.} and F. Farinon and H. Geissel and E. Haettner and M. Heil and Kempley, {R. S.} and R. Knoebel and C. Kozhuharov and J. Kurcewicz and N. Kuzminchuk and S. Litvinov and Z. Liu and R. Mao and C. Nociforo and F. Nolden and Plass, {W. R.} and A. Prochazka and C. Scheidenberger and M. Steck and Th. Stoehlker and B. Sun and Swan, {T. P. D.} and G. Trees and H. Weick and N. Winckler and M. Winkler and Woods, {P. J.} and T. Yamaguchi",

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day = "18",

doi = "10.1103/PhysRevLett.105.172501",

language = "English",

volume = "105",

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journal = "Physical Review Letters",

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Reed, MW, Cullen, IJ, Walker, PM, Litvinov, YA, Blaum, K, Bosch, F, Brandau, C, Carroll, JJ, Cullen, DM, Deo, AY, Detwiller, B, Dimopoulou, C, Dracoulis, GD, Farinon, F, Geissel, H, Haettner, E, Heil, M, Kempley, RS, Knoebel, R, Kozhuharov, C, Kurcewicz, J, Kuzminchuk, N, Litvinov, S, Liu, Z, Mao, R, Nociforo, C, Nolden, F, Plass, WR, Prochazka, A, Scheidenberger, C, Steck, M, Stoehlker, T, Sun, B, Swan, TPD, Trees, G, Weick, H, Winckler, N, Winkler, M, Woods, PJ & Yamaguchi, T 2010, 'Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements', Physical Review Letters, vol. 105, no. 17, 172501, pp. -. https://doi.org/10.1103/PhysRevLett.105.172501

TY - JOUR

T1 - Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements

AU - Reed, M. W.

AU - Cullen, I. J.

AU - Walker, P. M.

AU - Litvinov, Yu. A.

AU - Blaum, K.

AU - Bosch, F.

AU - Brandau, C.

AU - Carroll, J. J.

AU - Cullen, D. M.

AU - Deo, A. Y.

AU - Detwiller, B.

AU - Dimopoulou, C.

AU - Dracoulis, G. D.

AU - Farinon, F.

AU - Geissel, H.

AU - Haettner, E.

AU - Heil, M.

AU - Kempley, R. S.

AU - Knoebel, R.

AU - Kozhuharov, C.

AU - Kurcewicz, J.

AU - Kuzminchuk, N.

AU - Litvinov, S.

AU - Liu, Z.

AU - Mao, R.

AU - Nociforo, C.

AU - Nolden, F.

AU - Plass, W. R.

AU - Prochazka, A.

AU - Scheidenberger, C.

AU - Steck, M.

AU - Stoehlker, Th.

AU - Sun, B.

AU - Swan, T. P. D.

AU - Trees, G.

AU - Weick, H.

AU - Winckler, N.

AU - Winkler, M.

AU - Woods, P. J.

AU - Yamaguchi, T.

PY - 2010/10/18

Y1 - 2010/10/18

N2 - A study of cooled Au-197 projectile-fragmentation products has been performed with a storage ring. This has enabled metastable nuclear excitations with energies up to 3 MeV, and half-lives extending to minutes or longer, to be identified in the neutron-rich nuclides Hf-183,Hf-184,Hf-186 and Ta-186,Ta-187. The results support the prediction of a strongly favored isomer region near neutron number 116.

AB - A study of cooled Au-197 projectile-fragmentation products has been performed with a storage ring. This has enabled metastable nuclear excitations with energies up to 3 MeV, and half-lives extending to minutes or longer, to be identified in the neutron-rich nuclides Hf-183,Hf-184,Hf-186 and Ta-186,Ta-187. The results support the prediction of a strongly favored isomer region near neutron number 116.

UR - http://www.scopus.com/inward/record.url?scp=77958147748&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.105.172501

DO - 10.1103/PhysRevLett.105.172501

M3 - Article

SN - 0031-9007

VL - 105

SP - -

JO - Physical Review Letters

JF - Physical Review Letters

IS - 17

M1 - 172501

ER -

Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements

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