First observation of the decay of a 15- seniority v=4 isomer in 128Sn

S. Pietri; A. Jungclaus; M. Gorska; H. Grawe; M. Pfutzner; L. Caceres; P. Detistov; S. Lalkovski; V. Modamio; Z. Podolyák; P.H. Regan; D. Rudolph; J. Walker; E. Werner-Malento; P. Bednarczyk; P. Doomenbal; H. Geissel; J. Gerl; J. Grebosz; I. Kojouharov; N. Kurz; W. Prokopowicz; H. Schaffner; H.J. Wollersheim; K. Andgren; J. Benlliure; G. Benzoni; Alison Bruce; E. Casarejos; B. Cederwall; F.C.L. Crespi; B. Hadinia; M. Hellström; R. Hoischen; G. Ilie; A. Khaplanov; M. Kmiecik; R. Kumar; A. Maj; S. Mandal; F. Montes; S. Myalski; G. Simpson; S.J. Steer; S. Tashenov; O. Wieland

First observation of the decay of a 15- seniority v=4 isomer in 128Sn

S. Pietri, A. Jungclaus, M. Gorska, H. Grawe, M. Pfutzner, L. Caceres, P. Detistov, S. Lalkovski, V. Modamio, Z. Podolyák, P.H. Regan, D. Rudolph, J. Walker, E. Werner-Malento, P. Bednarczyk, P. Doomenbal, H. Geissel, J. Gerl, J. Grebosz, I. KojouharovN. Kurz, W. Prokopowicz, H. Schaffner, H.J. Wollersheim, K. Andgren, J. Benlliure, G. Benzoni, Alison Bruce, E. Casarejos, B. Cederwall, F.C.L. Crespi, B. Hadinia, M. Hellström, R. Hoischen, G. Ilie, A. Khaplanov, M. Kmiecik, R. Kumar, A. Maj, S. Mandal, F. Montes, S. Myalski, G. Simpson, S.J. Steer, S. Tashenov, O. Wieland

University of Brighton

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

Abstract

Isomeric states in the semimagic 128-130Sn isotopes were populated in the fragmentation of a 136Xe beam on a 9Be target at an energy of 750 A·MeV. The decay of an isomeric state in 128Sn at an excitation energy of 4098 keV has been observed. Its half live has been determined to be T1/2=220(30) ns from the time distributions of the delayed γ rays emitted in its decay. γγ coincidence relations were analyzed in order to establish the decay pattern of the newly established state toward the known (7-) and (10+) isomers at excitation energies of 2092 and 2492 keV, respectively. Based on a comparison with results of state-of-the-art shell-model calculations the new isomeric state is proposed to have the νh11/2-3d3/2-1 configuration with the four neutron holes in 132Sn maximally aligned to a total spin of Iπ=15-.

Original language	English
Journal	Physical Review C
Volume	83
Issue number	4
Publication status	Published - 29 Apr 2011

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Pietri, S., Jungclaus, A., Gorska, M., Grawe, H., Pfutzner, M., Caceres, L., Detistov, P., Lalkovski, S., Modamio, V., Podolyák, Z., Regan, P. H., Rudolph, D., Walker, J., Werner-Malento, E., Bednarczyk, P., Doomenbal, P., Geissel, H., Gerl, J., Grebosz, J., ... Wieland, O. (2011). First observation of the decay of a 15- seniority v=4 isomer in 128Sn. Physical Review C, 83(4).

@article{36a61543ce4f4dd886d603573b684ddc,

title = "First observation of the decay of a 15- seniority v=4 isomer in 128Sn",

abstract = "Isomeric states in the semimagic 128-130Sn isotopes were populated in the fragmentation of a 136Xe beam on a 9Be target at an energy of 750 A·MeV. The decay of an isomeric state in 128Sn at an excitation energy of 4098 keV has been observed. Its half live has been determined to be T1/2=220(30) ns from the time distributions of the delayed γ rays emitted in its decay. γγ coincidence relations were analyzed in order to establish the decay pattern of the newly established state toward the known (7-) and (10+) isomers at excitation energies of 2092 and 2492 keV, respectively. Based on a comparison with results of state-of-the-art shell-model calculations the new isomeric state is proposed to have the νh11/2-3d3/2-1 configuration with the four neutron holes in 132Sn maximally aligned to a total spin of Iπ=15-.",

author = "S. Pietri and A. Jungclaus and M. Gorska and H. Grawe and M. Pfutzner and L. Caceres and P. Detistov and S. Lalkovski and V. Modamio and Z. Podoly{\'a}k and P.H. Regan and D. Rudolph and J. Walker and E. Werner-Malento and P. Bednarczyk and P. Doomenbal and H. Geissel and J. Gerl and J. Grebosz and I. Kojouharov and N. Kurz and W. Prokopowicz and H. Schaffner and H.J. Wollersheim and K. Andgren and J. Benlliure and G. Benzoni and Alison Bruce and E. Casarejos and B. Cederwall and F.C.L. Crespi and B. Hadinia and M. Hellstr{\"o}m and R. Hoischen and G. Ilie and A. Khaplanov and M. Kmiecik and R. Kumar and A. Maj and S. Mandal and F. Montes and S. Myalski and G. Simpson and S.J. Steer and S. Tashenov and O. Wieland",

year = "2011",

month = apr,

day = "29",

language = "English",

volume = "83",

journal = "Physical Review C",

issn = "0556-2813",

number = "4",

}

Pietri, S, Jungclaus, A, Gorska, M, Grawe, H, Pfutzner, M, Caceres, L, Detistov, P, Lalkovski, S, Modamio, V, Podolyák, Z, Regan, PH, Rudolph, D, Walker, J, Werner-Malento, E, Bednarczyk, P, Doomenbal, P, Geissel, H, Gerl, J, Grebosz, J, Kojouharov, I, Kurz, N, Prokopowicz, W, Schaffner, H, Wollersheim, HJ, Andgren, K, Benlliure, J, Benzoni, G, Bruce, A, Casarejos, E, Cederwall, B, Crespi, FCL, Hadinia, B, Hellström, M, Hoischen, R, Ilie, G, Khaplanov, A, Kmiecik, M, Kumar, R, Maj, A, Mandal, S, Montes, F, Myalski, S, Simpson, G, Steer, SJ, Tashenov, S & Wieland, O 2011, 'First observation of the decay of a 15- seniority v=4 isomer in 128Sn', Physical Review C, vol. 83, no. 4.

TY - JOUR

T1 - First observation of the decay of a 15- seniority v=4 isomer in 128Sn

AU - Pietri, S.

AU - Jungclaus, A.

AU - Gorska, M.

AU - Grawe, H.

AU - Pfutzner, M.

AU - Caceres, L.

AU - Detistov, P.

AU - Lalkovski, S.

AU - Modamio, V.

AU - Podolyák, Z.

AU - Regan, P.H.

AU - Rudolph, D.

AU - Walker, J.

AU - Werner-Malento, E.

AU - Bednarczyk, P.

AU - Doomenbal, P.

AU - Geissel, H.

AU - Gerl, J.

AU - Grebosz, J.

AU - Kojouharov, I.

AU - Kurz, N.

AU - Prokopowicz, W.

AU - Schaffner, H.

AU - Wollersheim, H.J.

AU - Andgren, K.

AU - Benlliure, J.

AU - Benzoni, G.

AU - Bruce, Alison

AU - Casarejos, E.

AU - Cederwall, B.

AU - Crespi, F.C.L.

AU - Hadinia, B.

AU - Hellström, M.

AU - Hoischen, R.

AU - Ilie, G.

AU - Khaplanov, A.

AU - Kmiecik, M.

AU - Kumar, R.

AU - Maj, A.

AU - Mandal, S.

AU - Montes, F.

AU - Myalski, S.

AU - Simpson, G.

AU - Steer, S.J.

AU - Tashenov, S.

AU - Wieland, O.

PY - 2011/4/29

Y1 - 2011/4/29

N2 - Isomeric states in the semimagic 128-130Sn isotopes were populated in the fragmentation of a 136Xe beam on a 9Be target at an energy of 750 A·MeV. The decay of an isomeric state in 128Sn at an excitation energy of 4098 keV has been observed. Its half live has been determined to be T1/2=220(30) ns from the time distributions of the delayed γ rays emitted in its decay. γγ coincidence relations were analyzed in order to establish the decay pattern of the newly established state toward the known (7-) and (10+) isomers at excitation energies of 2092 and 2492 keV, respectively. Based on a comparison with results of state-of-the-art shell-model calculations the new isomeric state is proposed to have the νh11/2-3d3/2-1 configuration with the four neutron holes in 132Sn maximally aligned to a total spin of Iπ=15-.

AB - Isomeric states in the semimagic 128-130Sn isotopes were populated in the fragmentation of a 136Xe beam on a 9Be target at an energy of 750 A·MeV. The decay of an isomeric state in 128Sn at an excitation energy of 4098 keV has been observed. Its half live has been determined to be T1/2=220(30) ns from the time distributions of the delayed γ rays emitted in its decay. γγ coincidence relations were analyzed in order to establish the decay pattern of the newly established state toward the known (7-) and (10+) isomers at excitation energies of 2092 and 2492 keV, respectively. Based on a comparison with results of state-of-the-art shell-model calculations the new isomeric state is proposed to have the νh11/2-3d3/2-1 configuration with the four neutron holes in 132Sn maximally aligned to a total spin of Iπ=15-.

M3 - Article

SN - 0556-2813

VL - 83

JO - Physical Review C

JF - Physical Review C

IS - 4

ER -

First observation of the decay of a 15- seniority v=4 isomer in 128Sn

Abstract

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