Nuclear spectroscopic study of24Na

Abstract

The nucleus 24Na has been investigated by studying the gamma-rays emitted following thermal neutron capture in 23Na, with curved crystal and Ge(Li) spectrometers. Of the 277 transitions assigned to 24Na, 216 were placed in the 24Na level scheme containing 45 levels, of which six (1,961, 1,977, 3,866, 5,810, 5,918, and 6,222 keV) are reported for the first time. An average gamma-ray multiplicity of 3.3 gammas per neutron capture was observed. The neutron binding energy was determined to be 6,959.73 (14) keV. The resulting level scheme is compared to shell and rotational model predictions.Nuclear Reactions: 23Na (n, 7); E, = Thermal ; measured E~, 1~; deduced levels, J, To, 7-branching. Crystal spectrometer, Ge(Li) detector.

Nuclear spectroscopy of Na24 via (d⃗,p) and (n,γ) reactions

“…Differential cross sections at this angle are given in Table IV. (13) 0.14 3943.57 (8) 0.065 0.065 3976.95 (29) 0.039 4048.25 (20) 0.0013 4142.59 (21) 0.010 4187.30 (12) 0.44 4196.42 (16) 0.015 4207.03 (8) 0.044 0.096 4441.75 (10) 0.013 4526.87 (24) 0.004 0.098 4559.07 (18) 0.002 0.056 4621.12 (19) 0.0007 0.017 4693.30 (15) 0.0014 0.025 0.010 4750.78 (17) 0.011 0.11 0.11 4889.31 (18) 0.063 4908.28 (16) 0.006 0.006 4938.90 (13) 0.042 0.042 4973.83 (12) 0.002 0.039 5027. 33 (49) 0.012 5044.49 (17) 0.0031 0.018 5059.95 (10) 0.032 0.028 5117.34 (8) 0.26 5180.55 (13) 0.025 0.15 0.23 5192.51 (14) 0.014 0.017 0.017 data, the combination of the parameter set C for the input channel and of the parameter set B for the output channel was chosen as the best one and was used for the calculations of all transfers to measured transitions in the final nucleus.…”

“…Early ͑n, ␥͒ experiments were compiled in 1967 by Bartholomew et al [8]. Later the ͑n, ␥͒ reaction was measured by Nichol et al [9], Wilson et al [10], Tielens and co-workers [11,12], Hungerford et al [13], Ming et al [14], and Hori et al [15] in Hamilton, Argonne, Petten, Grenoble, Beijing, and Tokyo, respectively. More than 100 ␥ lines are seen in these studies.…”

Neutron binding and excitation energies of some Pb isotopes

“…For full experimental details see Sect. 3 of reference [3]. In addition the 7,368 keV line of z~ was recorded as a background line in another study [8].…”

“…During the course of a study of sd shell nuclei by the (n, 7) reaction [3,4], a target of natural PbF 2 was irradiated by thermal neutrons. The emitted gamma-rays were recorded using curved crystal and pair spectrometers, as well as a Ge(Li) detector.…”

“…These three transitions are assigned to 2~ Listed in Table 1 are the energies and intensities of the gamma-rays belonging to the Pb isotopes. As described in [3] the energies were calibrated using A1 and C1 transitions observed as background. These gamma-ray energies are known precisely [8,9] and are related in a known manner to the 411.8044(11) keV Au decay standard [10].…”