<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="normal">Ge</mml:mi><mml:mo>(</mml:mo><mml:mi>n</mml:mi><mml:mo>,</mml:mo><mml:mi /><mml:mrow><mml:msup><mml:mrow><mml:mi>n</mml:mi></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mi>γ</mml:mi><mml:mo>)</mml:mo></mml:math>Reactions and Low-Lying States of Ge Isotopes

Chung, K. C.; Mittler, A.; Brandenberger, J.D.; McEllistrem, M. T.

doi:10.1103/physrevc.2.139

Cited by 36 publications

(17 citation statements)

References 23 publications

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“…A 1464 keV v-ray was observed in the present work, but we are reluctant to assign it to a level in rubidium because of the presence of a background v-ray due to the 1465 keV level in 72Ge (see Ref. [14]). Because of its relative weakness, we could not by a sample in-sample out subtraction procedure confidently assign a 1464 keV transition to rubidium.…”

Section: The 87rb Nucleusmentioning

confidence: 82%

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Fast neutron scattering from rubidium

et al. 1973

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A study was made of the (n, n), (n, n'), and (n, n'~,) reactions which occur when a natural rubidium scattering sample is exposed to mono-energetic neutron fluxes of energies ranging from 120 to 1910 keV. Total cross sections, elastic scattering angular distributions and excitation functions for inelastic scattering were measured with a neutron time-of-flight spectrometer. Results are compared with Hauser-Feshbach theory. A 40 cc Ge(Li) detector was used in the time-gated mode to measure ~-rays from the (n, n'~,) reaction. The latter measurements were used to refine and extend the energy level schemes derived from neutron spectroscopy. Several new levels were discovered in the low-lying (below 1900 keV) energy level spectra of 8SRb and 87Rb. Gamma decay schemes and branching ratios were determined for the low-lying levels of 85Rb and 87Rb.

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Section: The 87rb Nucleusmentioning

confidence: 82%

“…Necessary cognisance was taken of the fact that a background y-ray at 868 keV is known to originate from neutron reactions in the Ge(Li) detector. This is due to slow neutron capture [14] in 73Ge. Subtraction of the "sample in" from "sample out" runs indicated the presence of a 868 keV 7-ray from rubidium.…”

Section: The 8srb Nucleusmentioning

confidence: 96%

Fast neutron scattering from rubidium

et al. 1973

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“…See References [26,27,28,29], for example. In particular, the sawtooth-shaped peaks due to 72,74 Ge(n, n ′ ) at 693 keV and 596 keV respectively are clear indications of neutrons and have been used to deduce neutron fluxes [30].…”

Section: The Neutron Fluxmentioning

confidence: 99%

Neutron inelastic scattering processes as a background for double-β decay experiments

et al. 2008

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We investigate several Pb(n, n ′ γ) and Ge(n, n ′ γ) reactions. We measure γ-ray production from Pb(n, n ′ γ) reactions that can be a significant background for double-beta decay experiments which use lead as a massive inner shield. Particularly worrisome for Ge-based double-beta decay experiments are the 2041-keV and 3062-keV γ rays produced via Pb(n, n ′ γ). The former is very close to the 76 Ge double-beta decay endpoint energy and the latter has a double escape peak energy near the endpoint. We discuss the implications of these γ rays on past and future double-beta decay experiments and estimate the cross section to excite the level that produces the 3062-keV γ ray. Excitation γ-ray lines from Ge(n, n ′ γ) reactions are also observed. We consider the contribution of such backgrounds and their impact on the sensitivity of next-generation searches for neutrinoless double-beta decay using enriched germanium detectors.

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“…2b) was irradiated [16] with various neutron sources (RaBe, AmBe, and neutrons from the 2H(d, n)3He reaction at Ed= 100 keV). The neutron flux was monitored here via the flux of the known neutron-induced y-ray lines in the Ge(Li) detector material [27]. However, no evidence for a 1809 keV y-ray line was found.…”

Section: The 1809 Kev 7-ray Yield and Contributions From Contaminantmentioning

confidence: 99%

Helium burning of22Ne

Wolke

Harms

Becker

et al. 1989

Z. Physik A - Atomic Nuclei

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The 2ZNe(c~,7)26Mg and 22Ne(cq n)2SMg reactions were investigated for E~(lab) from 0.71 to 2.25 MeV. Neon gas enriched to 99% in 22Ne was recirculated in a differentially pumped gas target system of the extended type. The 7-ray transitions were observed with Ge(Li) detectors and the neutrons with 3He ionization chambers. A previously known resonance at ER(lab)= 2.05 MeV was verified and 15 new resonances were found in the energy range covered, with the lowest at ER(lab)=0.83 MeV. Information on resonance energies, widths, strengths, 7-ray branching ratios, as well as J" assignments, is reported. The energy range investigated corresponds to the important temperature range of T9 from 0.3 to 1.4 (109 K), for which the astrophysical rates were determined for both reactions. The results show that the ratios of the rates for 22Ne(c~,n)2SMg and 22Ne(c~, 7)26Mg are significantly smaller than the previously adopted values, e.g., by at least a factor of 60 near T9=0.65. Thus, the 22Ne(e, n)25Mg reaction will likely play a smaller role as a neutron source for s-process nucleosynthesis, than has frequently been assumed.

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Ge(n,n′γ)Reactions and Low-Lying States of Ge Isotopes

Cited by 36 publications

References 23 publications

Fast neutron scattering from rubidium

Fast neutron scattering from rubidium

Neutron inelastic scattering processes as a background for double-β decay experiments

Helium burning of22Ne

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