Low-lying 128I excited states from the (n, γ) reaction

S. L. Sakharov; V. L. Alexeev; I. A. Kondurov; E. K. Leushkin; Yu E. Loginov; V. V. Martynov; V. L. Rumiantsev; P. A. Sushkov; Yu L. Khazov; A. I. Egorov; H. Lindner; H. Hiller; T. von Egidy; G. Hlawatsch; J. Klora; U. Mayerhofer; H. Trieb; A. Walter

doi:10.1016/0375-9474(91)90092-K

Low-lying ¹²⁸I excited states from the (n, γ) reaction

S. L. Sakharov
, V. L. Alexeev
, I. A. Kondurov
, E. K. Leushkin
, Yu E. Loginov
, V. V. Martynov
, V. L. Rumiantsev
, P. A. Sushkov
, Yu L. Khazov
, A. I. Egorov
, H. Lindner
, H. Hiller
, T. von Egidy
, G. Hlawatsch
, J. Klora
, U. Mayerhofer
, H. Trieb
, A. Walter

Chair of Physics I

Petersburg Nuclear Phys. Inst.
Technical University of Munich

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

11 Scopus citations

Abstract

Gamma and conversion-electron spectra following the¹²⁷I(n, γ)¹²⁸I reaction have been studied with bent-crystal, magnetic, Ge(Li) and Si(Li) spectrometers in the range 20-600 keV. Gamma-gamma prompt and delayed coincidences in the range 25-600 keV have been investigated with the use of two Ge(Li) detectors. The ¹²⁸I level scheme involving 40 levels in the energy range 0-1000 keV has been constructed. Parity is determined for all the levels introduced. Unique spin values are assigned to 30 levels. The half-lives of the 133.611, 137.851 and 167.367 keV levels have been measured to be 12 ± 3, 845 ± 20 and 175 ± 15 ns, respectively. The ¹²⁷I(d, p)¹²⁸I reaction has been investigated with 22 MeV deuterons at an angle of 30°. The ¹²⁹I(d, t)¹²⁸I reaction has been studied with 15 MeV deuterons at an angle of 30°. The (n, γ) levels are found to match well with those from the (d, p), (d, t), (n_res, γ_primary) and (p, n) reactions. A comparison of the (n, γ) levels with the (d, p) and (d, t) levels enabled the identification of the πg_{7 2}νS_{1 2}, πg_{7 2}νd_{3 2}, πg_{7 2}νh_{11 2}, πd_{5 2}νS_{1 2}, πd_{5 2}νd_{3 2} and πd_{5 2}νh_{11 2} two-quasiparticle multiplets. Energy splittings of these pn configurations by residual interactions taken as a combination of short-range Wigner, singlet and tensor forces have been calculated.

Original language	English
Pages (from-to)	317-347
Number of pages	31
Journal	Nuclear Physics, Section A
Volume	528
Issue number	2
DOIs	https://doi.org/10.1016/0375-9474(91)90092-K
State	Published - 10 Jun 1991

Keywords

Nuclear reaction

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10.1016/0375-9474(91)90092-K

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Sakharov, S. L., Alexeev, V. L., Kondurov, I. A., Leushkin, E. K., Loginov, Y. E., Martynov, V. V., Rumiantsev, V. L., Sushkov, P. A., Khazov, Y. L., Egorov, A. I., Lindner, H., Hiller, H., von Egidy, T., Hlawatsch, G., Klora, J., Mayerhofer, U., Trieb, H., & Walter, A. (1991). Low-lying ¹²⁸I excited states from the (n, γ) reaction. Nuclear Physics, Section A, 528(2), 317-347. https://doi.org/10.1016/0375-9474(91)90092-K

@article{e9cd47a56a9247ba919e59d5a15c63a1,

title = "Low-lying 128I excited states from the (n, γ) reaction",

abstract = "Gamma and conversion-electron spectra following the127I(n, γ)128I reaction have been studied with bent-crystal, magnetic, Ge(Li) and Si(Li) spectrometers in the range 20-600 keV. Gamma-gamma prompt and delayed coincidences in the range 25-600 keV have been investigated with the use of two Ge(Li) detectors. The 128I level scheme involving 40 levels in the energy range 0-1000 keV has been constructed. Parity is determined for all the levels introduced. Unique spin values are assigned to 30 levels. The half-lives of the 133.611, 137.851 and 167.367 keV levels have been measured to be 12 ± 3, 845 ± 20 and 175 ± 15 ns, respectively. The 127I(d, p)128I reaction has been investigated with 22 MeV deuterons at an angle of 30°. The 129I(d, t)128I reaction has been studied with 15 MeV deuterons at an angle of 30°. The (n, γ) levels are found to match well with those from the (d, p), (d, t), (nres, γprimary) and (p, n) reactions. A comparison of the (n, γ) levels with the (d, p) and (d, t) levels enabled the identification of the πg 7 2νS 1 2, πg 7 2νd 3 2, πg 7 2νh 11 2, πd 5 2νS 1 2, πd 5 2νd 3 2 and πd 5 2νh 11 2 two-quasiparticle multiplets. Energy splittings of these pn configurations by residual interactions taken as a combination of short-range Wigner, singlet and tensor forces have been calculated.",

keywords = "Nuclear reaction",

author = "Sakharov, \{S. L.\} and Alexeev, \{V. L.\} and Kondurov, \{I. A.\} and Leushkin, \{E. K.\} and Loginov, \{Yu E.\} and Martynov, \{V. V.\} and Rumiantsev, \{V. L.\} and Sushkov, \{P. A.\} and Khazov, \{Yu L.\} and Egorov, \{A. I.\} and H. Lindner and H. Hiller and \{von Egidy\}, T. and G. Hlawatsch and J. Klora and U. Mayerhofer and H. Trieb and A. Walter",

year = "1991",

month = jun,

day = "10",

doi = "10.1016/0375-9474(91)90092-K",

language = "English",

volume = "528",

pages = "317--347",

journal = "Nuclear Physics, Section A",

issn = "0375-9474",

publisher = "Elsevier B.V.",

number = "2",

}

Sakharov, SL, Alexeev, VL, Kondurov, IA, Leushkin, EK, Loginov, YE, Martynov, VV, Rumiantsev, VL, Sushkov, PA, Khazov, YL, Egorov, AI, Lindner, H, Hiller, H, von Egidy, T, Hlawatsch, G, Klora, J, Mayerhofer, U, Trieb, H & Walter, A 1991, 'Low-lying ¹²⁸I excited states from the (n, γ) reaction', Nuclear Physics, Section A, vol. 528, no. 2, pp. 317-347. https://doi.org/10.1016/0375-9474(91)90092-K

TY - JOUR

T1 - Low-lying 128I excited states from the (n, γ) reaction

AU - Sakharov, S. L.

AU - Alexeev, V. L.

AU - Kondurov, I. A.

AU - Leushkin, E. K.

AU - Loginov, Yu E.

AU - Martynov, V. V.

AU - Rumiantsev, V. L.

AU - Sushkov, P. A.

AU - Khazov, Yu L.

AU - Egorov, A. I.

AU - Lindner, H.

AU - Hiller, H.

AU - von Egidy, T.

AU - Hlawatsch, G.

AU - Klora, J.

AU - Mayerhofer, U.

AU - Trieb, H.

AU - Walter, A.

PY - 1991/6/10

Y1 - 1991/6/10

N2 - Gamma and conversion-electron spectra following the127I(n, γ)128I reaction have been studied with bent-crystal, magnetic, Ge(Li) and Si(Li) spectrometers in the range 20-600 keV. Gamma-gamma prompt and delayed coincidences in the range 25-600 keV have been investigated with the use of two Ge(Li) detectors. The 128I level scheme involving 40 levels in the energy range 0-1000 keV has been constructed. Parity is determined for all the levels introduced. Unique spin values are assigned to 30 levels. The half-lives of the 133.611, 137.851 and 167.367 keV levels have been measured to be 12 ± 3, 845 ± 20 and 175 ± 15 ns, respectively. The 127I(d, p)128I reaction has been investigated with 22 MeV deuterons at an angle of 30°. The 129I(d, t)128I reaction has been studied with 15 MeV deuterons at an angle of 30°. The (n, γ) levels are found to match well with those from the (d, p), (d, t), (nres, γprimary) and (p, n) reactions. A comparison of the (n, γ) levels with the (d, p) and (d, t) levels enabled the identification of the πg 7 2νS 1 2, πg 7 2νd 3 2, πg 7 2νh 11 2, πd 5 2νS 1 2, πd 5 2νd 3 2 and πd 5 2νh 11 2 two-quasiparticle multiplets. Energy splittings of these pn configurations by residual interactions taken as a combination of short-range Wigner, singlet and tensor forces have been calculated.

AB - Gamma and conversion-electron spectra following the127I(n, γ)128I reaction have been studied with bent-crystal, magnetic, Ge(Li) and Si(Li) spectrometers in the range 20-600 keV. Gamma-gamma prompt and delayed coincidences in the range 25-600 keV have been investigated with the use of two Ge(Li) detectors. The 128I level scheme involving 40 levels in the energy range 0-1000 keV has been constructed. Parity is determined for all the levels introduced. Unique spin values are assigned to 30 levels. The half-lives of the 133.611, 137.851 and 167.367 keV levels have been measured to be 12 ± 3, 845 ± 20 and 175 ± 15 ns, respectively. The 127I(d, p)128I reaction has been investigated with 22 MeV deuterons at an angle of 30°. The 129I(d, t)128I reaction has been studied with 15 MeV deuterons at an angle of 30°. The (n, γ) levels are found to match well with those from the (d, p), (d, t), (nres, γprimary) and (p, n) reactions. A comparison of the (n, γ) levels with the (d, p) and (d, t) levels enabled the identification of the πg 7 2νS 1 2, πg 7 2νd 3 2, πg 7 2νh 11 2, πd 5 2νS 1 2, πd 5 2νd 3 2 and πd 5 2νh 11 2 two-quasiparticle multiplets. Energy splittings of these pn configurations by residual interactions taken as a combination of short-range Wigner, singlet and tensor forces have been calculated.

KW - Nuclear reaction

UR - https://www.scopus.com/pages/publications/44949277364

U2 - 10.1016/0375-9474(91)90092-K

DO - 10.1016/0375-9474(91)90092-K

M3 - Article

AN - SCOPUS:44949277364

SN - 0375-9474

VL - 528

SP - 317

EP - 347

JO - Nuclear Physics, Section A

JF - Nuclear Physics, Section A

IS - 2

ER -

Low-lying ¹²⁸I excited states from the (n, γ) reaction

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Keywords

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