First Observation of the Decay of a 15- Seniority v=4 Isomer in 128Sn

S. Pietri; A. Jungclaus; M. Gorska; H. Grawe; M. Pfuetzner; L. Caceres; P. Detistov; S. Lalkovski; V. Modamio; Z. Podolyak; P. H. Regan; Dirk Rudolph; J. Walker; E. Werner-Malento; P. Bednarczyk; P. Doornenbal; H. Geissel; J. Gerl; J. Grebosz; I. Kojouharov; N. Kurz; W. Prokopowicz; H. Schaffner; H. J. Wollersheim; K. Andgren; J. Benlliure; G. Benzoni; A. M. Bruce; E. Casarejos; B. Cederwall; F. C. L. Crespi; B. Hadinia; Margareta Hellström; Robert 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

doi:10.1103/PhysRevC.83.044328

First Observation of the Decay of a 15- Seniority v=4 Isomer in 128Sn

S. Pietri, A. Jungclaus, M. Gorska, H. Grawe, M. Pfuetzner, L. Caceres, P. Detistov, S. Lalkovski, V. Modamio, Z. Podolyak, P. H. Regan, Dirk Rudolph, J. Walker, E. Werner-Malento, P. Bednarczyk, P. Doornenbal, H. Geissel, J. Gerl, J. Grebosz, I. KojouharovN. Kurz, W. Prokopowicz, H. Schaffner, H. J. Wollersheim, K. Andgren, J. Benlliure, G. Benzoni, A. M. Bruce, E. Casarejos, B. Cederwall, F. C. L. Crespi, B. Hadinia, Margareta Hellström, Robert 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

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Abstract

Isomeric states in the semimagic Sn128-130 isotopes were populated in the fragmentation of a Xe-136 beam on a Be-9 target at an energy of 750 A.MeV. The decay of an isomeric state in Sn-128 at an excitation energy of 4098 keV has been observed. Its half live has been determined to be T-1/2 = 220(30) ns from the time distributions of the delayed gamma rays emitted in its decay. gamma gamma 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 nu h(11/2)(-3)d(3/2)(-1) configuration with the four neutron holes in Sn-132 maximally aligned to a total spin of I-pi = 15(-).

Original language	English
Article number	044328
Journal	Physical Review C (Nuclear Physics)
Volume	83
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.83.044328
Publication status	Published - 2011

Subject classification (UKÄ)

Subatomic Physics

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Pietri2011-e044328

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Pietri, S., Jungclaus, A., Gorska, M., Grawe, H., Pfuetzner, M., Caceres, L., Detistov, P., Lalkovski, S., Modamio, V., Podolyak, Z., Regan, P. H., Rudolph, D., Walker, J., Werner-Malento, E., Bednarczyk, P., Doornenbal, 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 (Nuclear Physics), 83(4), [044328]. https://doi.org/10.1103/PhysRevC.83.044328

@article{2666fa48962345b3a4847583afe36103,

title = "First Observation of the Decay of a 15- Seniority v=4 Isomer in 128Sn",

abstract = "Isomeric states in the semimagic Sn128-130 isotopes were populated in the fragmentation of a Xe-136 beam on a Be-9 target at an energy of 750 A.MeV. The decay of an isomeric state in Sn-128 at an excitation energy of 4098 keV has been observed. Its half live has been determined to be T-1/2 = 220(30) ns from the time distributions of the delayed gamma rays emitted in its decay. gamma gamma 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 nu h(11/2)(-3)d(3/2)(-1) configuration with the four neutron holes in Sn-132 maximally aligned to a total spin of I-pi = 15(-).",

author = "S. Pietri and A. Jungclaus and M. Gorska and H. Grawe and M. Pfuetzner and L. Caceres and P. Detistov and S. Lalkovski and V. Modamio and Z. Podolyak and Regan, {P. H.} and Dirk Rudolph and J. Walker and E. Werner-Malento and P. Bednarczyk and P. Doornenbal and H. Geissel and J. Gerl and J. Grebosz and I. Kojouharov and N. Kurz and W. Prokopowicz and H. Schaffner and Wollersheim, {H. J.} and K. Andgren and J. Benlliure and G. Benzoni and Bruce, {A. M.} and E. Casarejos and B. Cederwall and Crespi, {F. C. L.} and B. Hadinia and Margareta Hellstr{\"o}m and Robert 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 Steer, {S. J.} and S. Tashenov and O. Wieland",

year = "2011",

doi = "10.1103/PhysRevC.83.044328",

language = "English",

volume = "83",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "4",

}

Pietri, S, Jungclaus, A, Gorska, M, Grawe, H, Pfuetzner, M, Caceres, L, Detistov, P, Lalkovski, S, Modamio, V, Podolyak, Z, Regan, PH, Rudolph, D, Walker, J, Werner-Malento, E, Bednarczyk, P, Doornenbal, P, Geissel, H, Gerl, J, Grebosz, J, Kojouharov, I, Kurz, N, Prokopowicz, W, Schaffner, H, Wollersheim, HJ, Andgren, K, Benlliure, J, Benzoni, G, Bruce, AM, 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 (Nuclear Physics), vol. 83, no. 4, 044328. https://doi.org/10.1103/PhysRevC.83.044328

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 - Pfuetzner, M.

AU - Caceres, L.

AU - Detistov, P.

AU - Lalkovski, S.

AU - Modamio, V.

AU - Podolyak, Z.

AU - Regan, P. H.

AU - Rudolph, Dirk

AU - Walker, J.

AU - Werner-Malento, E.

AU - Bednarczyk, P.

AU - Doornenbal, 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, A. M.

AU - Casarejos, E.

AU - Cederwall, B.

AU - Crespi, F. C. L.

AU - Hadinia, B.

AU - Hellström, Margareta

AU - Hoischen, Robert

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

Y1 - 2011

N2 - Isomeric states in the semimagic Sn128-130 isotopes were populated in the fragmentation of a Xe-136 beam on a Be-9 target at an energy of 750 A.MeV. The decay of an isomeric state in Sn-128 at an excitation energy of 4098 keV has been observed. Its half live has been determined to be T-1/2 = 220(30) ns from the time distributions of the delayed gamma rays emitted in its decay. gamma gamma 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 nu h(11/2)(-3)d(3/2)(-1) configuration with the four neutron holes in Sn-132 maximally aligned to a total spin of I-pi = 15(-).

AB - Isomeric states in the semimagic Sn128-130 isotopes were populated in the fragmentation of a Xe-136 beam on a Be-9 target at an energy of 750 A.MeV. The decay of an isomeric state in Sn-128 at an excitation energy of 4098 keV has been observed. Its half live has been determined to be T-1/2 = 220(30) ns from the time distributions of the delayed gamma rays emitted in its decay. gamma gamma 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 nu h(11/2)(-3)d(3/2)(-1) configuration with the four neutron holes in Sn-132 maximally aligned to a total spin of I-pi = 15(-).

U2 - 10.1103/PhysRevC.83.044328

DO - 10.1103/PhysRevC.83.044328

M3 - Article

VL - 83

JO - Physical Review C

JF - Physical Review C

SN - 2469-9985

IS - 4

M1 - 044328

ER -

First Observation of the Decay of a 15- Seniority v=4 Isomer in 128Sn

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