The continuum part of (3He, t) spectra at E3He = 52 MeV

Aarts, Ehl Emile; Bhowmik, R. K.; Meijer, de Rj Rob; Werf, van der Sy

doi:10.1016/0370-2693(81)90623-7

Cited by 27 publications

(10 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cross section data for equivalent neutron energies corresponding to less than ~15.5 MeV of excitation energy were discarded due to possible partial energy deposition ("punch through") of the tritons in the particle telescope. Above 25.5 MeV excitation energy (low triton energy), there may be significant contribution of additional tritons from the nuclear interaction of the beam with 16 breakup-transfer mechanism, prominent at forward angles [17]. Such additional tritons lower the deduced fission probability and thereby reduce the extracted cross section.…”

Section: Discussionmentioning

confidence: 99%

The (3He,tf) as a surrogate reaction to determine (n,f) cross sections in the 10–20 MeV energy range

Basunia¹,

Clark²,

Goldblum³

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

The surrogate reaction 238 IntroductionNeutron-induced reaction cross section data for radioactive nuclei are important for various basic and applied sciences [1, 2], however, target preparation for such studies is often complicated by material accessibility, availability, and radioactivity. The Surrogate Method provides access to such nuclear data indirectly [3]. In this method, the compound nucleus of a desired neutron-induced reaction is produced via a surrogate reaction and the decay probability of the compound nucleus to the desired exit channel, for example: fission, is measured experimentally by tagging on a fission event in coincidence with the ejected particle of the surrogate reaction, for example: 't' in the ( 3 He,t) reaction.Earlier work on the indirect determination of neutron-induced fission cross section was reported in the 1970s [4][5][6]. In recent years, there has been a renewed effort both in the forefront of theory and experiment to utilize indirect methods more effectively to address 2 nuclear data needs [7][8][9][10][11][12] MeV energy range. The Surrogate MethodIn the Hauser-Feshbach formulation [14], the cross-section, σ αχ , for forming a compound nucleus (CN) via entrance channel α and its subsequent decay via exit channel χ ( 237 Np+n and fission, respectively here) can be expressed as:where E* , J, and π are the excitation energy, total angular momentum, and parity of the CN, σ α CN is the compound nuclear formation cross section via entrance channel α and CN G χ is the probability of the CN decay through exit channel χ. In the case for neutrons incident on 237 Np,

show abstract

Section: Discussionmentioning

confidence: 99%

The (3He,tf) as a surrogate reaction to determine (n,f) cross sections in the 10–20 MeV energy range

Basunia¹,

Clark²,

Goldblum³

et al. 2009

Nuclear Instruments and Methods in Physics Research Section B:

View full text Add to dashboard Cite

show abstract

“…The width of the bump has been studied systematically for 3 He-induced reactions (Matsuoka et al, 1978;Bousshid et al, 1980;Aarts, Bhowmik et al, 1981;Aarts, 1983; Aarts, Malfliet, . In this section we report on these studies.…”

Section: B Width Of the Bumpmentioning

confidence: 99%

“…Such a shape is characteristic for statistical emission. Aarts, Bhowmik et al (1981), Aarts (1983), and Aarts, Malfliet, have identified this process as absorptive breakup. The definition of this process was given earlier as "a reaction in which a subset of projectile nucleons suffers strong interaction with the target nucleus resulting in either evaporation or non-statistical emission of particles from the residual nucleus, leaving the remaining subset of projectile nucleons to continue with essentially their initial momentum prior to the interaction."…”

Section: Absorptive Breakupmentioning

confidence: 99%

“…We therefore will refer to this component of the continuum as the tail These components of the continuum have been studied over a wide range of incident energies. For 3 He projectiles the investigations were carried out at E -52 MeV (Aarts, Bhowmik et al, 1981;Aarts, Grasdijk et al, 1981;Aarts, 1982Aarts, ,1983; Aarts, Malfliet, , 68 MeV (Bousshid et al, 1980), 70 MeV (Matsuoka, 1978), 90 MeV (Matsuoka et al, 1978, 110 MeV (Matsuoka et al, 1978), and 130 MeV (Bojowald et al, 1981;Djaloeis et al, 1983). Inclusive spectra from a-induced reactions have been investigated at £=65 MeV , 80 MeV , 120 MeV (Koeslag et al, 1983(Koeslag et al, ,1984, 140 MeV (Wu et al, 1978;Koontz, 1980), 160 MeV , and 172.5 MeV (Budzanowski et al, 1978;Shyam et al, 1983).…”

Section: A Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Breakup phenomena in nuclear collision processes with He projectiles

Meijer

Kamermans

1985

Rev. Mod. Phys.

View full text Add to dashboard Cite

This paper reviews the experimental and theoretical studies of breakup processes induced by He projectiles. For this type of reaction knowledge of three-body kinematics is imperative; hence important aspects are summarized. Although some nuclear structure information has been studied with this type of reaction, the emphasis of this review is mainly on the reaction mechanism. The phenomena described here are quite general, so the consequences for other projectiles (i.e., heavy ions) are also discussed.

show abstract

“…For convenience it is designated the (α,p,d) breakup peak. A similar peak was seen at forward angles in ( 3 He,xt) spectra with about two-thirds of the projectile energy [21,22] and was thought to possibly represent ( 3 He,d) breakup followed by the deuteron picking up a spectator neutron.…”

Section: Additional Breakup Peak In the (αD) Spectramentioning

confidence: 64%

Phenomenological model for light-projectile breakup

Kalbach

2017

Phys. Rev. C

View full text Add to dashboard Cite

Background: Projectile breakup can make a large contribution to reactions induced by projectiles with mass numbers 2, 3, and 4, yet there is no global model for it and no clear agreement on the details of the reaction mechanism.Purpose: This project aims to develop a phenomenological model for light-projectile breakup that can guide the development of detailed theories and provide a useful tool for applied calculations.Method: An extensive database of double-differential cross sections for the breakup of deuterons, 3 He ions, and α particles was assembled from the literature and analyzed in a consistent way.Results: Global systematics for the centroid energies, peak widths, and angular distributions of the breakup peaks have been extracted from the data. The dominant mechanism appears to be absorptive breakup, where the unobserved projectile fragment fuses with the target nucleus during the initial interaction. The global target-mass-number and incident-energy dependences of the absorptive breakup cross section have also been determined, along with channel-specific normalization constants. Conclusions:Results from the model generally agree with the original data after subtraction of a reasonable underlying continuum. Absorptive breakup can account for as much as 50 to 60% of the total reaction cross section.

show abstract

The continuum part of (3He, t) spectra at E3He = 52 MeV

Cited by 27 publications

References 9 publications

The (3He,tf) as a surrogate reaction to determine (n,f) cross sections in the 10–20 MeV energy range

The (3He,tf) as a surrogate reaction to determine (n,f) cross sections in the 10–20 MeV energy range

Breakup phenomena in nuclear collision processes with He projectiles

Phenomenological model for light-projectile breakup

Contact Info

Product

Resources

About