Isovector giant resonances in 6He, 12B, 90Y, 120In, and 208Tl observed in the (7Li,7Be) charge-exchange reaction

Annakkage, T.; Jänecke, J.; Winfield, J. S.; Berg, G.P.A.; Brown, J.; Crawley, G.M.; Danczyk, Stephen A.; Fujiwara, M̄.; Mercer, D.; Pham, Kevin; Roberts, D. A.; Stasko, J.; Yoo, Geonwook

doi:10.1016/s0375-9474(99)00015-9

Cited by 19 publications

(4 citation statements)

References 96 publications

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“…As a general finding, the two-step mechanisms tend to be small at incident energies far above the Coulomb barrier. This has been reported in ( 12 C, 12 B) [80], ( 12 C, 12 N), ( 13 C, 13 N) [81] and in ( 7 Li, 7 Be) reactions [77], [82], [83], [84], [85], [78], [86], [87], [88] explored at different energies from 5 to 70 MeV/u and on different targets. In references [78], [89] it was shown that quantitative information on GT matrix elements can be extracted from ( 7 Li, 7 Begs(3/2 -)) and ( 7 Li, 7 Be0.43…”

Section: A View Of Heavy Ion Single Charge Exchange Reactionssupporting

confidence: 73%

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

et al. 2018

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The article describes the main achievements of the NUMEN project together with an updated and detailed overview of the related R&D activities and theoretical developments. NUMEN proposes an innovative technique to access the nuclear matrix elements entering the expression of the lifetime of the double beta decay by cross section measurements of heavy-ion induced Double Charge Exchange (DCE) reactions. Despite the two processes, namely neutrinoless double beta decay and DCE reactions, are triggered by the weak and strong interaction respectively, important analogies are suggested. The basic point is the coincidence of the initial and final state many-body wave-functions in the two types of processes and the formal similarity of the transition operators. First experimental results obtained at the INFN-LNS laboratory for the 40 Ca( 18 O, 18 Ne) 40 Ar reaction at 270 MeV, give encouraging indication on the capability of the proposed technique to access relevant quantitative information.The two major aspects for this project are the K800 Superconducting Cyclotron and MAGNEX spectrometer. The former is used for the acceleration of the required high resolution and low emittance heavy ion beams and the latter is the large acceptance magnetic spectrometer for the detection of the ejectiles. The use of the high-order trajectory reconstruction technique, implemented in MAGNEX, allows to reach the experimental resolution and sensitivity required for the accurate measurement of the DCE cross sections at forward angles. However, the tiny values of such cross sections and the resolution requirements demand beam intensities much larger than manageable with the present facility. The on-going upgrade of the INFN-LNS facilities in this perspective is part of the NUMEN project and will be discussed in the article.3

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Section: A View Of Heavy Ion Single Charge Exchange Reactionssupporting

confidence: 73%

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

et al. 2018

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“…Refs. [16][17][18][19][20][21][22]). Key for such studies is that the unit cross sections are conveniently calibrated using transitions for which the GT transition strengths (B(GT )) are known from β-decay f t values:…”

Section: Introductionmentioning

confidence: 99%

Gamow-Teller unit cross sections for (t,He3) and (
Perdikakis
¹
,
Zegers
²
,
Austin
³

et al. 2011
Phys. Rev. C
38
3
41
0
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The proportionality between differential cross sections at vanishing linear momentum transfer and Gamow-Teller transition strength, expressed in terms of the unit cross section (σGT ) was studied as a function of target mass number for (t, 3 He) and ( 3 He,t) reactions at 115 AMeV and 140 AMeV, respectively. Existing ( 3 He,t) and (t, 3 He) data on targets with mass number 12 ≤ A ≤ 120 were complemented with new and reevaluated (t, 3 He) data on proton, deuteron, 6 Li and 12 C targets. It was found that in spite of the small difference in beam energies between the two probes, the unit cross sections have a nearly identical and simple dependence on target mass number A, for A ≥ 12: σGT = 109/A 0.65 . The factorization of the unit cross sections in terms of a kinematical factor, a distortion factor and the strength of the effective spin-isospin transfer nucleus-nucleus interaction was investigated. Simple phenomenological functions depending on mass number A were extracted for the latter two. By comparison with plane and distorted-wave Born approximation calculations, it was found that the use of a short-range approximation for knock-on exchange contributions to the transition amplitude results in overestimated cross sections for reactions involving the composite ( 3 He,t) and (t, 3 He) probes.

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“…There are however many experiments revealing the existence of high-lying resonances of e.g. collective nature [44][45][46][47][48][49][50][51][52][53]. The collective resonances obtained in this paper would be hidden among the broad many-channel resonance structure.…”

Section: Analysis Of Resonancesmentioning

confidence: 75%

“…In some cases (e.g. [44][45][46][47][48][49][50][51][52][53]), resonance signals were detected, but determination of the quantum numbers was not always possible.…”

Section: Introductionmentioning

confidence: 99%

Influence of monopole and quadrupole channels on the cluster continuum of the lightest p-shell nuclei

Sytcheva

Broeckhove

Arickx

et al. 2006

J. Phys. G: Nucl. Part. Phys.

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We study 4 < A < 8 p-shell nuclei in a two-cluster description coupled to collective monopole and quadrupole modes and focus on the effect of the latter coupling on the two-cluster continuum. The calculations are based on the modified J -matrix method which is a microscopic algebraic approach to scattering calculations. All states and resonances in the two-cluster continuum model space below the monopole threshold are calculated. It is observed that the shape resonances are influenced by the coupling to the monopole and quadrupole channels. In addition, these channels introduce a number of high-lying resonances. We have analysed the wavefunctions in terms of the Feshbach formalism to elicit the characteristics of the resonances.

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Isovector giant resonances in 6He, 12B, 90Y, 120In, and 208Tl observed in the (7Li,7Be) charge-exchange reaction

Cited by 19 publications

References 96 publications

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

Gamow-Teller unit cross sections for (t,He3) and (
Perdikakis
¹
,
Zegers
²
,
Austin
³

et al. 2011
Phys. Rev. C
38
3
41
0
View full text Add to dashboard Cite

Influence of monopole and quadrupole channels on the cluster continuum of the lightest p-shell nuclei

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Isovector giant resonances in 6He, 12B, 90Y, 120In, and 208Tl observed in the (7Li,7Be) charge-exchange reaction

Cited by 19 publications

References 96 publications

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay

Gamow-Teller unit cross sections for (t,He3) and (Perdikakis1, Zegers2, Austin3 et al. 2011Phys. Rev. C383410View full textAdd to dashboardCite

Influence of monopole and quadrupole channels on the cluster continuum of the lightest p-shell nuclei

Contact Info

Product

Resources

About

Gamow-Teller unit cross sections for (t,He3) and (
Perdikakis
¹
,
Zegers
²
,
Austin
³

et al. 2011
Phys. Rev. C
38
3
41
0
View full text Add to dashboard Cite