Decay scheme of 2.71 h 92Sr

doi:10.1016/0375-9474(71)90455-6

Nuclear Physics A

Volume 175, Issue 3, 15 November 1971, Pages 629-640

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Abstract

Gamma rays emitted in the decay of 2.71 h ⁹²Sr have been investigated with a Ge(Li) detector. Sources were prepared by separating Sr from fission products. A total of 10 γ-rays were attributed to the decay of ⁹²Sr in a complex spectra with interferences from ⁹¹Sr and ⁹²Y. Gamma-gamma coincidences in the decay of ⁹²Sr were observed with a NaI(Tl)Ge(Li) setup. The decay scheme of ⁹²Sr was constructed, involving placement of 8 of the γ-rays emitted between ⁹²Y excited states at 241.4, 892.8, 953.3 and 1383.9 keV. The observed level structure is compared with previously reported predictions based on effective interaction calculations. The value for the half-life of ⁹²Sr was determined to be 2.71 ± 0.01 h.

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Cited by (18)

Nuclear Data Sheets for A = 92
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Nuclear structure and decay data pertaining to all nuclides with mass number A = 92 (As, Se, Br, Kr, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh, Pd) have been compiled and evaluated, and incorporated into the ENSDF data file. All literature available by 15 September 2012 has been considered. This evaluation supersedes the previous publication for this mass chain (Coral M. Baglin, Nuclear Data Sheets 91, 423 (2000) (November 2000 cutoff date)), and subsequent unpublished reevaluations by C.M. Baglin for ⁹²Kr (January 2004 literature cut-off) and ⁹²Sr (August 2003 literature cut-off).
Accurate γ-ray spectrometry measurements of the half-life of <sup>92</sup>Sr
2008, Applied Radiation and Isotopes
Studies of the nuclear fuel cycle require an accurate knowledge of the energy release from the decay of radioactive nuclides produced in a reactor, including precise half-life data for the short-lived radionuclides. Moreover, short-lived fission products are crucial for fission rate distribution measurements performed in low-power facilities, such as EOLE and MINERVE of CEA Cadarache [Fougeras, P., 2005. EOLE, MINERVE and MASURCA facilities and their associated neutron experimental programs. In: 13th International Conference on Nuclear Engineering, Beijing, China, 16–20 May 2005], and their nuclear decay data need to be known to high precision. For these reasons, the half-life of ⁹²Sr has been measured to solve a recently observed inconsistency identified with the quoted value in the main nuclear applications libraries (including JEFF3.1): T_1/2=2.71±0.01 h [Parsa, B., Ashari, A., Goolvard, L., Nobar, Y.M., 1971. Decay scheme of 2.71 h ⁹²Sr. Nucl. Phys. A 175, 629–640].
An overestimation of 4.5% has been identified in this work, based on two independent methods. Specific γ-ray spectrometry measurements on activated fissile foils have been carried out, using two HPGe detectors. Influencing factors such as net area measurements of photopeaks, pulse pile-up accuracy and dead time corrections in the presence of decaying activity are discussed. A new value has been obtained by combining eight series of measurements: T_1/2=2.594±0.006 h. The uncertainty has been reduced by a factor of two with respect to previous evaluations. This measured value also shows good agreement with the most recent studies of T_1/2=2.627±0.009 h [Nir-El, Y., 2003. Private Communications. Soreq Research Centre, Yavne, Israel].
Nuclear Data Sheets for A = 234
2007, Nuclear Data Sheets
Nuclear data sheets for A = 92
2000, Nuclear Data Sheets
Nuclear structure data pertaining to all nuclides with mass number A=92 have been compiled and evaluated, and incorporated into the ENSDF data file. All literature available by 7 November 2000 has been considered. This evaluation supersedes the previous publication for this mass chain (Coral M. Baglin, Nuclear Data Sheets 66, 347 (1992) (May 1992 cutoff data)), and all subsequent unpublished reevaluations incorporated into the ENSDF file prior to the present work.
Nuclear Data Sheets for A = 92
1992, Nuclear Data Sheets
Nuclear structure data pertaining to all nuclei with mass number A=92 have been compiled and evaluated. These data are summarized and presented here, together with the relevant level schemes from radioactive decay and reaction studies. This evaluation for A=92 supersedes the earlier one by P. Luksch (80Lu05), published in Nuclear Data Sheets 30, 573 (1980). A new reference, Phys. Rev. C45, 2161 (1992), on high-spin states in ⁹²Mo from (HI,xnγ) reaction was received after the evaluation was sent to the publisher. The new data are available in ENSDF.
Nuclear data sheets for A=234
1983, Nuclear Data Sheets

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Decay scheme of 2.71 h 92Sr

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Decay scheme of 2.71 h ⁹²Sr