Nuclear data sheets for A = 59

Kim, H.J.

doi:10.1016/s0090-3752(76)80007-5

Cited by 48 publications

(10 citation statements)

References 39 publications

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“…For the levels below 1.5 MeV the agreement with these previous data is excellent, (14) . 2) but for the decay of the 1627 and 1725 keV levels several new weak branches are observed. The decay of the other 49 states in table 3 is essentially new.…”

Section: Resultsmentioning

confidence: 91%

Investigation of the 56Fe(n, γ)57Fe and 58Fe(n, γ)59Fe reactions

et al. 1980

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Abstract:The y-radiation has been investigated produced by thermal neutron capture in a natural Fe sample and in a sample enriched in 5sFe. Of the 253 y-rays ascribed to the 56Fe(n, y)"Fe reaction, 19 1 have been placed in the 57Fe level scheme (of which 124 placements are new); of the 138 y-rays observed in the 58Fe(n, y)s9Fe reaction 68 have been placed (with 55 new placements). Excitation energies (with 0.02-0.7 keV error) and branching ratios have been determined of 60 bound levels in S7Fe and of 27 in 59Fe The Q-values of the s6,"Fe(n, y) reactions amount to 7646.OkO.2 and 6581.0+0.2 keV, respectively. One can conclude that J = 3 for the 2836 keV level in 57Fe, and that J" = +-for the 2570, 3072, 3104, 3160 and 3384 keV levels in 59Fe.A shell-model calculation has been performed with up to two holes in the If,,, sub-shell and particles in the 2p,,,, If,,, and 2p,,, sub-shells. The energies of low-lying ". 58, s9Fe states are reproduced with a mean deviation of 0.17 MeV. The surface-delta interaction appears superior over the Kuo-Brown interaction in explaining the electromagnetic properties of the lowest six states of "Fe. E NUCLEAR REACTIONS s6. s*Fe(n, y), E = thermal; measured E,, I?; deduced Q. 57, 59Fe levels deduced E,, y-branching, J". Enriched and natural targets.

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Section: Resultsmentioning

confidence: 91%

Investigation of the 56Fe(n, γ)57Fe and 58Fe(n, γ)59Fe reactions

et al. 1980

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“…The spins and parities are the adopted values from the Nuclear Data Sheets [14][15][16][17] are presented in Table 7 along with the previously known values [5,21]. Again the estimated errors in the Q-values were around 0.10 keV but have been raised to 0.20 keV.…”

Section: Discussionmentioning

confidence: 95%

“…The 6751.98 and 6429.54-keV transitions may be interpreted as secondary transitions leading to ground state. However, the large uncertainties associated with the (d, p) level energies [14] make definite assignments rather difficult. The 3131.90 and 2706.60-keV transitions may also be interpreted as ground state transitions from the corresponding levels observed in the (d, p) reaction [12].…”

Section: Transitions In 61nimentioning

confidence: 99%

“…In addition, several studies of the nickel isotopes have been conducted by means of (d, p) reactions employing either polarized [7][8][9] or unpolarized [l(L13] deuterons. Summaries of energylevel information for nickel are available in recent compilations of the Nuclear Data Sheets [14][15][16][17]. In the present thermal-neutron-capture study, 7 rays of intermediate to high energy, 2 to 9 MeV, were examined by means of Ge(Li)-NaI(T1) pairspectrometer system of greatly improved sensitivity, as reported by Robertson et al [18].…”

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confidence: 96%

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Thermal neutron capture in isotopes of nickel

et al. 1977

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The gamma-ray spectra associated with thermal neutron capture in targets of 5SNi, 6~ 62Ni, and 64Ni have been observed with a high-sensitivity pair-spectrometer. Level schemes for the four product nuclei are discussed, correlation of widths with neutron single-particle states examined, and estimates for M1 and E2 7-ray strength functions obtained.The stable isotopes of nickel, which range in mass number from 58 to 64, fall within a mass region commanding considerable interest. In particular, since four of the five naturally occurring isotopes provide even-even target nuclei, one might expect strong correlation between (d, p) single-particle strengths and reduced radiative widths for transitions to l, = 1 final states following thermal neutron capture. Since in the latter reaction much of the radiated strength is concentrated in a few high-energy ~ rays, the characteristics of such 7 rays, and associated energy levels, are well known. The low-energy 7 rays from thermal neutron capture in nickel isotopes have also been well established [1 6]. In addition, several studies of the nickel isotopes have been conducted by means of (d, p) reactions employing either polarized [7][8][9] or unpolarized [l(L13] deuterons. Summaries of energylevel information for nickel are available in recent compilations of the Nuclear Data Sheets [14][15][16][17]. In the present thermal-neutron-capture study, 7 rays of intermediate to high energy, 2 to 9 MeV, were examined by means of Ge(Li)-NaI(T1) pairspectrometer system of greatly improved sensitivity, as reported by Robertson et al. [18]. The remarkable reduction in continuum achieved by this system, in particular at intermediate photon energies, permitted detection of several low intensity y rays helpful in the understanding of decay characteristics, and, in gen-* Permanent Address: Nuclear Physics Division, Pinstech, P.O. Nilore, Rawalpindi, Pakistan eral, led to a more complete collection of information than available to date. Moreover, since the nickel isotopes were studied en bloc, both as constituents of a natural target and as enriched targets, it was possible to obtain accurate estimates of intensities and widths, which checked as consistent with known isotopic abundances and thermal neutron-capture cross sections. Improved Q-value estimates were correspondingly obtained for all isotopes studied.

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“…Numerous experimental studies of the 59Co nucleus has been done, and the information has been extracted from these studies by Kim [1]. The level structure is fairly well-known, but branching ratios, spins, reduced transition probabilities and mixing ratios are, except for the lowest levels, not uniquely determined.…”

Section: Introductionmentioning

confidence: 99%