Formation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>by 14-Mev Neutron Bombardment of Li and Be

Battat, M.E.; Ribe, F.L.

doi:10.1103/physrev.89.80

Cited by 36 publications

(4 citation statements)

References 7 publications

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“…Other contributions are expected there, since the two-neutron (S2n = 8.476 MeV) and alpha (Sα = 7.409 MeV) emission thresholds are open. In order to estimate these contributions, at least in their shapes, the experimental data [101] of the 9 Be(n,nn) 8 Be [102], [103] [104], [105] and 9 Be(n,α) 6 He [106] [107] [108] are superimposed on the experimental spectrum in Figure 3.6. The data were scaled by a factor 10 -3 resulting from the ratio between the free n-9 Be cross-section [100] and the present 18 O-9 Be reaction.…”

Section: Continuum Single-particle Spectroscopy By One-neutron Transfmentioning

confidence: 99%

“…Total 1-n break-up calculations resulting from the use of the DOM and the AB potentials (see text)[100] are shown as the green continuous and the violet dashed lines, respectively. The experimental data [101] of the 9 Be(n,nn) 8 Be [102],[103],[104],[105] and 9 Be(n,α)6 He[106],[107],[108] reactions are drawn as red dotted and blue dotted-dashed line, respectively. The 1n-(S2n), 2n-(S2n) and α-(Sα) separation energies are also indicated.…”

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confidence: 99%

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The MAGNEX spectrometer: Results and perspectives

et al. 2016

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This article discusses the main achievements and future perspectives of the MAGNEX spectrometer at the INFN-LNS laboratory in Catania (Italy). MAGNEX is a large acceptance magnetic spectrometer for the detection of the ions emitted in nuclear collisions below Fermi energy. In the first part of the paper an overview of the MAGNEX features is presented. The successful application to the precise reconstruction of the momentum vector, to the identification of the ion masses and to the determination of the transport efficiency is demonstrated by in-beam tests. In the second part, an overview of the most relevant scientific achievements is given. Results from nuclear elastic and inelastic scattering as well as from transfer and charge exchange reactions in a wide range of masses of the colliding systems and incident energies are shown. The role of MAGNEX in solving old and new puzzles in nuclear structure and direct reaction mechanisms is emphasized. One example is the recently observed signature of the long searched Giant Pairing Vibration. Finally, the new challenging opportunities to use MAGNEX for future experiments are briefly reported. In particular, the use of double charge exchange reactions toward the determination of the nuclear matrix elements entering in the expression of the half-life of neutrinoless double beta decay is discussed. The new NUMEN project of INFN, aiming at these investigations, is introduced. The challenges connected to the major technical upgrade required by the project in order to investigate rare processes under high fluxes of detected heavy ions are outlined. Magnetic spectrometers in Nuclear Reaction studies .

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Section: Continuum Single-particle Spectroscopy By One-neutron Transfmentioning

confidence: 99%

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confidence: 99%

The MAGNEX spectrometer: Results and perspectives

et al. 2016

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“…Weak resonances are reported at E n = 3.73 and 4.27 MeV by (1955SA1E). The cross section at E n = 14 MeV is 10 ± 1 mb (1953BA04). See also (1947AL1A, 1957VA12).…”

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Energy Levels of Light Nuclei. V

1955

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1. He'(m m)He': E""=0. 95 (center of mass); mass defect = 12.92~0.05. 2. Li'(1 o)Hes: He'=He'+v+0. 97+0.05; mass defect = 12.94~0.05. 3. Li'(d He')He'. Qs --0.91&0. 09;mass defect= 12.85 0.09. 4. Li'(d o)He'. Qs --14.23&0.07; mass defect= 12.85 0.07. We adopt: He' mass defect=12. 92&0.08 Mev. I. (a) H'(d n)He4 Q =17.577 Zs 16. 63--(b) H'(1 e)He4The yield exhibits a pronounced maximum near E~=107 kev, with a cross section of 4.95&0.14 b (Ar 54) t Lsee also (Aj 52c)). Precise cross sections in the tange 8&=10 to 1700 kev are tabulated by (Ar 52d), ' E. P. Wigner and L. Eisenbud, Phys. Rev. 72, 29 (1947); T.Teichmann and E. P. Wigner, Phys. Rev. 87, 123 (1952).f' References are indicated by the erst two letters of the 6rst named author and are listed at the end of the article. VIII. Li6(y t)He' Q = -15.786 This reaction has not been observed with 17.6-Mev gammas. The cross section is &6&4pb (Ti 54b). Ix. Li~(e g')Li6 See Li'. Li'(e e')Li'. X. (a) Li'(p p')Li'* (b) Li'(d d')Li'* Proton and deuteron groups are observed corresponding to the state at 2.19 Mev. At Eq= 7.4 Mev (|I = 90'), no deuteron group corresponding to the presumed T= 1 state at 3.57 Mev is observed [(Br53h) and C. P. Browne, private communication). See also (Aj 52c). ENERGY LEVELS OF LIGHT NUCLEI Lie, Be6 He7, Li7XI. Li'(p d)Li' Q"= -5.010Deuteron groups have been observed corresponding to the ground state, and to levels at 2.2&0.2 and 3.7 &0.2 Mev (Fr 52). At E"=18 Mev, angular distributions of the deuterons to the ground state and the 2.19-Mev level, analyzed by pickup theory, indicate l"=1 and hence even parity, 7 &3, for both states (Re 54a).XII. Li'(d t)Li' Q = -0.988The angular distributions of the tritons, analyzed by pickup theory, indicates l"=1, and hence even parity for the ground state (Ho 53c, Le 54) and for the 2.19-Mev state (Le 54). At Eq 14.5 M-ev, the cross sections Ka

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“…The calculated result of 6 Li(n,p) cross section is compared with the experimental data [30][31][32][33][34][35][36] in Fig. 6.…”

Section: Calculation Results Of N+ 6 LImentioning

confidence: 99%

Theoretical calculations and analysis for n + ⁶Li reaction

2017

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Abstract. R-matrix theory is an important methodology for applications on light, medium and heavy mass nuclides nuclear reaction in the resonance energy range. Full R-matrix formalism contains the diagonal elements of the energy levels matrix and it is a rigorous theory. Because of different assumptions and approximations, many kinds of R-matrix derived methods are obtained. The new R-matrix code FDRR is presented and includes 4 kinds of R-matrix applications. It can be used for calculating integral cross sections and angular distributions of 2-bodies reactions. The cross sections and angular distributions of n+ 6 Li reaction are calculated and analyzed by FDRR code. The results are in good agreement with experimental data below 20 MeV.

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Formation ofHe6by 14-Mev Neutron Bombardment of Li and Be

Cited by 36 publications

References 7 publications

The MAGNEX spectrometer: Results and perspectives

The MAGNEX spectrometer: Results and perspectives

Energy Levels of Light Nuclei. V

Theoretical calculations and analysis for n + ⁶Li reaction

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Formation ofHe6by 14-Mev Neutron Bombardment of Li and Be

Cited by 36 publications

References 7 publications

The MAGNEX spectrometer: Results and perspectives

The MAGNEX spectrometer: Results and perspectives

Energy Levels of Light Nuclei. V

Theoretical calculations and analysis for n + 6Li reaction

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Theoretical calculations and analysis for n + ⁶Li reaction