Measurement of the neutron-capture cross section of 76Ge and 74Ge below 15 MeV and its relevance to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mn>0</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:math> decay searches of 76Ge

Bhike, M.; Fallin, B.; Krishichayan,; Tornow, W.

doi:10.1016/j.physletb.2014.12.004

Cited by 18 publications

(33 citation statements)

References 26 publications

(16 reference statements)

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“…64 These results are of special interest for double beta decay experiments like GERDA and Majorana. Neutron capture results in a cascade of prompt de-excitation gamma rays from excited states of produced nucleus and the emissions from the decay of this nucleus, if it is radioactive.…”

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confidence: 89%

Cosmogenic activation of materials

Cebrián

2017

Int. J. Mod. Phys. A

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Experiments looking for rare events like the direct detection of dark matter particles, neutrino interactions or the nuclear double beta decay are operated deep underground to suppress the effect of cosmic rays. But the production of radioactive isotopes in materials due to previous exposure to cosmic rays is an hazard when ultra-low background conditions are required. In this context, the generation of long-lived products by cosmic nucleons has been studied for many detector media and for other materials commonly used. Here, the main results obtained on the quantification of activation yields on the Earth's surface will be summarized, considering both measurements and calculations following different approaches. The isotope production cross sections and the cosmic ray spectrum are the two main ingredients when calculating this cosmogenic activation; the different alternatives for implementing them will be discussed. Activation that can take place deep underground mainly due to cosmic muons will be briefly commented too. Presently, the experimental results for the cosmogenic production of radioisotopes are scarce and discrepancies between different calculations are important in many cases, but the increasing interest on this background source which is becoming more and more relevant can help to change this situation.

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confidence: 89%

Cosmogenic activation of materials

Cebrián

2017

Int. J. Mod. Phys. A

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“…Another example is the reaction 136 Xe(n,2n) 135 Xe, which is important to guide evaluations and theoretical calculations aimed at estimating the importance of neutron-induced background effects in searches for neutrino-less double-β decay of 136 Xe [175]. Additional high-energy neutron induced reactions important for neutrino-less double-β decay searches are capture on Ge isotopes [176] and inelastic scattering off Pb isotopes [177]. An example of the data status of high energy neutron induced reactions for rare event searches is given in Figure 28.…”

Section: High Energy Neutron Induced Measurementsmentioning

confidence: 99%

The Soreq Applied Research Accelerator Facility (SARAF): Overview, research programs and future plans

Mardor¹,

Aviv²,

Avrigeanu³

et al. 2018

Eur. Phys. J. A

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The Soreq Applied Research Accelerator Facility (SARAF) is under construction in the Soreq Nuclear Research Center at Yavne, Israel. When completed at the beginning of the next decade, SARAF will be a user facility for basic and applied nuclear physics, based on a 40 MeV, 5 mA CW proton/deuteron superconducting linear accelerator. Phase I of SARAF (SARAF-I, 4 MeV, 2mA CW protons, 5 MeV 1mA CW deuterons) is already in operation, generating scientific results in several fields of interest. The main ongoing program at SARAF-I is the production of 30 keV neutrons and measurement of Maxwellian Averaged Cross Sections (MACS), important for the astrophysical s-process. The world leading Maxwellian epithermal neutron yield at SARAF-I (5×10 10 epithermal neutrons/sec), generated by a novel Liquid-Lithium Target (LiLiT), enables improved precision of known MACSs, and new measurements of lowabundance and radioactive isotopes. Research plans for SARAF-II span several disciplines: Precision studies of beyond-Standard-Model effects by trapping light exotic radioisotopes, such as 6 He, 8 Li and 18,19,23 Ne, in unprecedented amounts (including meaningful studies already at SARAF-I); extended nuclear astrophysics research with higher energy neutrons, including generation and studies of exotic neutron-rich isotopes relevant to the rapid (r-) process; nuclear structure of exotic isotopes; high energy neutron cross sections for basic nuclear physics and material science research, including neutron induced radiation damage; neutron based imaging and therapy; and novel radiopharmaceuticals development and production.

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“…1 of Ref. [5]). A total of three slabs were used one at a time during the course of the measurements to optimize the efficiency of our irradiation and counting procedure.…”

Section: Experiments and Proceduresmentioning

confidence: 88%

Total and isomeric-state cross sections for theGe76(n,2n)Ge75reaction

2017

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The cross section for the reaction 76 Ge(n,2n) 75 Ge to both the isomeric and ground state of 75 Ge has been measured with the activation method between 10 and 15 MeV in small energy steps to help resolve inconsistencies in the existing database. The 197 Au(n,2n) 196 Au reaction with its known cross section was used for normalization of the data, which are compared to experimental and evaluated data of the EXFOR, EAF, JENDL, ENDF, and TENDL libraries. Model calculations using the TALYS-1.8 code are presented which also allow for the extrapolation to higher neutron energies. The data are important to estimate potential neutron-induced backgrounds in currently running large-scale experiments aimed at the discovery of neutrinoless double-beta decay of 76 Ge.

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Measurement of the neutron-capture cross section of 76Ge and 74Ge below 15 MeV and its relevance to 0νββ decay searches of 76Ge

Cited by 18 publications

References 26 publications

Cosmogenic activation of materials

Cosmogenic activation of materials

The Soreq Applied Research Accelerator Facility (SARAF): Overview, research programs and future plans

Total and isomeric-state cross sections for theGe76(n,2n)Ge75reaction

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