Identification of 88Se and search for delayed neutron emission from 87Se and 88Se

Marmol, P. del; Perricos, D.C.

doi:10.1016/0022-1902(70)80052-5

Cited by 24 publications

(10 citation statements)

References 8 publications

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“…"The mass identification was carried out by measuring the time of flight (TOF) and the magnetic rigidity Bρ with an accuracy of 10 −4 ." 125 and 10 counts of 82 Zn and 83 Zn were observed, respectively.…”

Section: 83 Znmentioning

confidence: 93%

“…Bernas et al observed 82 Zn and 83 Zn for the first time in 1997 as reported in their paper "Discovery and cross-section measurement of 58 new fission products in projectile-fission of 750•A MeV 238 U" [48]. Uranium ions were accelerated to 750 A•MeV by the GSI UNILAC/SIS accelerator facility and bombarded a beryllium target.…”

Section: 83 Znmentioning

confidence: 99%

“…Snell discovered 83 Se in 1937 as reported in "The Radioactive Isotopes of Bromine: Isomeric Forms of Bromine 80" [73]. The Berkeley cyclotron was used to bombard selenium targets with 5.5 MeV deuterons and 83 Se was produced in the reaction 82 Se(d,p). The activities were measured with a quartz-fiber electroscope following chemical separation.…”

Section: Sementioning

confidence: 99%

“…The activities were measured with a quartz-fiber electroscope following chemical separation. The observation of 83 Se was discussed in the context of the observation of 83 Br which was proposed to be produced in the decay of 83 Se. "...By growth from a hitherto unknown selenium 83; i.e., the bromine 83 would be the second member in a pair of successive β-emitters, the reactions being Se 82 (D,p)Se 83 , Se 83 → Br 83 + e − , Br 83 → Kr 83 + e − .…”

Section: Sementioning

confidence: 99%

“…The observation of 83 Se was discussed in the context of the observation of 83 Br which was proposed to be produced in the decay of 83 Se. "...By growth from a hitherto unknown selenium 83; i.e., the bromine 83 would be the second member in a pair of successive β-emitters, the reactions being Se 82 (D,p)Se 83 , Se 83 → Br 83 + e − , Br 83 → Kr 83 + e − . There was evidence for the second process in the decay curves of the selenium fractions obtained in the experiments, and it appeared that the selenium 83 had a half-life of 17±5 minutes."…”

Section: Sementioning

confidence: 99%

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Discovery of zinc, selenium, bromine, and neodymium isotopes

Gross

Claes

Kathawa

et al. 2012

Atomic Data and Nuclear Data Tables

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Currently, thirty-two zinc, thirty-two selenium, twenty-nine bromine and thirty-one neodymium isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.[119]. A 40 Ca beam from the Berkeley SuperHILAC bombarded a gas-cooled 92 Mo target. 127 Nd was produced in the fusion-evaporation reaction 92 Mo( 40 Ca,αn) and identified with the on-line isotope separator OASIS. "From the growth and decay data, a half-life of 1.9 ± 0.4 s was deduced, which is in good agreement with the calculated value of 1.8 s for 127 Nd." This half-life is included in the currently accepted average value of 1.8(4) s. 128 NdIn 1985 128 Nd was identified by Lister et al. in "Deformation of Very Light Rare-Earth Nuclei" [120]. A 40 Ca beam from the Daresbury Laboratory Van de Graaff accelerator was incident on a 92 Mo target and 128 Nd was produced in the fusion-evaporation reaction 92 Mo( 40 Ca,2p2n). Gamma rays, neutrons and charged particles were detected and new ground-state bands observed. "This letter reports results on the ground-state bands in the even-even nuclei 128 ." An earlier identification and half-life measurement of 4(2) s [119] was later refuted [121]. 5.4. 129−133 Nd The first identification of 129 Nd, 130 Nd, 131 Nd, 132 Nd, and 133 Nd, was reported in 1977 by Bogdanov et al. in "New Neutron-Deficient Isotopes of Barium and Rare-Earth Elements" [122]. The Dubna U-300 Heavy Ion Cyclotron accelerated a 32 S beam which bombarded enriched targets of 102 Pd and 106 Cd. The isotopes were identified with the BEMS-2 isotope separator. "In the present paper, isotopes were mainly identified by measuring the γ-ray and X-ray spectra of the daughter nuclei formed as a result of measuring the β + decay. In addition, the decay curves of the total β-activity of given isobars have been measured." The reported half-life of 5.9(6) s for 129 Nd is close to the accepted value of 4.9(2) s. The half-life of 28(3) s for 130 Nd is within a factor of two of the currently accepted value of 13(3) s. The half-lives of 24(3) s ( 131 Nd) and 105(10) s ( 132 Nd) are included in the currently accepted average values of 25.4(9) s and 94(8) s. The half-life of 70(10) s for 133 Nd corresponds to the presently adopted half-life. 5.5. 134,135 Nd 134 Nd and 135 Nd were discovered by Abdurazakov et al. in the 1970 paper "New Isotopes 133 Pr, 134 Nd, and 135 Nd; Decay Schemes of 134 Pr and 135 Pr" [123]. Spallation reactions were induced by 660 MeV protons irradiating a gadolinium target at the Joint Institute for Nuclear Reactions in Dubna, Russia. The reaction products were then chemically separated and identified by the measured γ-ray spectra. " 134 Nd was identified and its half-life determined via the strongest γ rays of 134 Pr (T = 17±2 min) with energies 409.2 and 639.0 keV.[The figure] shows the build-up and decline of the intensity of the 409.2 keV γ lray of 134 Pr. The half-life of was found from the...

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Section: 83 Znmentioning

confidence: 93%