Cross sections for the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Li</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>7</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow><mml:mn /><mml:mo>(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>n</mml:mi><mml:mo>)</mml:mo><mml:mn /><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Be</mml:mi></mml:mrow>

Poppe, C. H.; Anderson, J. D.; Davis, J.C.; Grimes, S. M.; Wong, C.

doi:10.1103/physrevc.14.438

Cited by 87 publications

(43 citation statements)

References 15 publications

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“…The threshold energy of the 6 Li(p, n) and 6 Li(p, pn) reactions are 5.92 and 6.62 MeV, respectively. Thus the neutron yield contribution from the 6 Li(p, n) and 6 Li(p, pn) reactions are negligible below an incident proton energy of 9 MeV [75] due to its low isotopic abundance and higher threshold value. The Q-value for the 7 Li(p, n) 7 Be reaction leading to the ground and first excited states are −1.644 and −2.079 MeV, respectively.…”

Section: Calculation Of the Neutron Energy And Average Excitation Energymentioning

confidence: 96%

“…The branching ratio to the ground state and first excited state of 7 Be up to E p = 7 MeV is given by Liskien and Paulsen [76] as well as by Meadows and Smith [77]. Similarly, Poppe et al [75] have given the branching ratio to the ground state and first excited state of 7 Be for E p = 4.2 MeV to 26 MeV. On the other hand, Meadows and Smith [77] have given experimental neutron distributions from the break up channels and also parameterized these distributions.…”

Section: Calculation Of the Neutron Energy And Average Excitation Energymentioning

confidence: 98%

“…On the other hand, Meadows and Smith [77] have given experimental neutron distributions from the break up channels and also parameterized these distributions. Based on those parameters, we have generated the neutron spectrum using the neutron energy distribution [75][76][77] and shown in our earlier work [72,73]. From those neutron spectra [72,73], the flux-weighted average neutron energies were calculated as 6.…”

Section: Calculation Of the Neutron Energy And Average Excitation Energymentioning

confidence: 99%

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Measurement of fission product yields in the quasi-mono-energetic neutron-induced fission of 238U

et al. 2015

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The cumulative yields of various fission products in the 6. 35, 8.53, 9.35 and 12.52 MeV quasi-monoenergetic neutron induced fission of 238 U have been determined by using the off-line γ -ray spectrometric technique. The mass chain yields were obtained from the fission product yields by using charge distribution correction. From the mass yield data, the peak-to-valley (P/V) ratio, the average value of light mass ( A L ), heavy mass ( A H ) and thus the average number of neutrons ( υ expt ) were obtained in the 238 U(n, f ) reaction for the above mentioned four neutron energies. The present and literature data in the 238 U(n, f ) and 238 U (γ, f ) reactions at various energies were compared to arrive at the following conclusions. (i) The yields of fission products for A = 133-134, A = 138-140, and A = 143-144 and their complementary products in the 238 U(n, f ) and 238 U(γ, f ) reactions are higher than other fission products, which has been explained from the point of even-odd effect and standard I and standard II asymmetric mode of fission. (ii) The yields of symmetric products increase and thus the peak-to-valley (P/V) ratios decrease with excitation energy, whereas the ν expt values increase with excitation energy. (iii) The variation of A L , A H and υ expt values with excitation energy behave differently in between 238 U(n, f ) and 238 U(γ, f ) reactions, which may be due to the different types of reaction mechanism for the neutron and photon with 238 U. = 6. 35, 8.53, 9.35 and 12.52 MeV; measured fission product yields, mass yield distributions, off-line γ -ray spectrometric technique, peak-to-valley (P/V) ratio, average number of neutrons ( υ expt ), average light mass ( A L ), average heavy mass ( A H )

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Section: Calculation Of the Neutron Energy And Average Excitation Energymentioning

confidence: 96%

Section: Calculation Of the Neutron Energy And Average Excitation Energymentioning

confidence: 98%

Section: Calculation Of the Neutron Energy And Average Excitation Energymentioning

confidence: 99%

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Measurement of fission product yields in the quasi-mono-energetic neutron-induced fission of 238U

et al. 2015

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“…As an alternative to the monoenergetic neutron beams, the 7 Li (p,n) or 9 Be(p,n) reactions can be used for producing semimonoenergetic neutrons involving thin targets [5][6][7]. Lithium is not only chemically reactive but also has a lower melting point ð179 1CÞ and a lower thermal conductivity ð45 W=m1CÞ as compared to beryllium.…”

Section: Introductionmentioning

confidence: 99%

Neutron spectra produced by 30, 35 and 40 MeV proton beams at KIRAMS MC-50 cyclotron with a thick beryllium target

Shin

Bak

Ham

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…No peak for n 3 is visible, because the large width of the 3rd excited state in 7 Be, ΔE ¼ 1:2 MeV[18], results in a very broad energy and TOF distribution of n 3 neutrons with a flat maximum around channel 700. The shape of the continuum component n X has been derived from the published neutron spectrum of Poppe et al[30] for the 7 Li(p,n) reaction at Θ lab ¼ 3.51 and E p ¼ 10 MeV. Part of the energy-TOF distribution of events in the LaBr 3 detector at E p ¼ 5 MeV showing the prompt γ-ray band at TOF $ 5200 and the band from n 0 -n 1 -induced interactions at TOF $ 3900.…”

mentioning

confidence: 99%

Fast-neutron induced background in LaBr3:Ce detectors

Kiener

Tatischeff

Deloncle

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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The response of a scintillation detector with a cylindrical 1.5-inch LaBr3:Ce crystal to incident neutrons has been measured in the energy range En = 2-12 MeV. Neutrons were produced by proton irradiation of a Li target at Ep = 5-14.6 MeV with pulsed proton beams. Using the time-of-flight information between target and detector, energy spectra of the LaBr3:Ce detector resulting from fast neutron interactions have been obtained at 4 different neutron energies. Neutron-induced gamma rays emitted by the LaBr3:Ce crystal were also measured in a nearby Ge detector at the lowest proton beam energy. In addition, we obtained data for neutron irradiation of a large-volume high-purity Ge detector and of a NE-213 liquid scintillator detector, both serving as monitor detectors in the experiment. Monte-Carlo type simulations for neutron interactions in the liquid scintillator, the Ge and LaBr3:Ce crystals have been performed and compared with measured data. Good agreement being obtained with the data, we present the results of simulations to predict the response of LaBr3:Ce detectors for a range of crystal sizes to neutron irradiation in the energy range En = 0.5-10 MeVComment: 28 pages, 10 figures, 4 Table

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Cross sections for theLi7(p,n)Be

Cited by 87 publications

References 15 publications

Measurement of fission product yields in the quasi-mono-energetic neutron-induced fission of 238U

Measurement of fission product yields in the quasi-mono-energetic neutron-induced fission of 238U

Neutron spectra produced by 30, 35 and 40 MeV proton beams at KIRAMS MC-50 cyclotron with a thick beryllium target

Fast-neutron induced background in LaBr3:Ce detectors

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