A new measurement of the astrophysical 8Li(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi>α</mml:mi><mml:mo>,</mml:mo><mml:mi>n</mml:mi></mml:math>)11B reaction

Ishiyama, H.; Hashimoto, Takashi; Ishikawa, Tomoko; Watanabe, Yutaka; Das, S.K.; Miyatake, H.; Mizoi, Y.; Fukuda, T.; Tanaka, Minoru; Fuchi, Y.; Yoshikawa, N.; Hirayama, Y.; Jeong, S. C.; Nomura, T.; Katayama, Ichiro; Mitsuoka, S.; Nishio, K.; Matsuda, M.; Saha, P.K.; Ichikawa, Shinichi; Ikezoe, H.; Furukawa, T.; Izumi, H.; Shimoda, T.; Nakai, K.

doi:10.1016/j.physletb.2006.07.036

Cited by 27 publications

(28 citation statements)

References 13 publications

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“…[25]). In particular, the exclusive data of Ishiyama et al [26] are lower than the other measurements. The determination of the reaction rate requires a numerical integration over the Gamow window [27].…”

Section: Astrophysical Reaction Ratementioning

confidence: 66%

See 1 more Smart Citation

The8Li(p,α)5He reaction at low energies, and
Mendes
¹
,
Lépine‐Szily
²
,
Descouvemont
³

et al. 2012
Phys. Rev. C

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We present a direct measurement of the low-energy 8 Li(p, α) 5 He cross section, using a radioactive 8 Li beam impinging on a thick target. With four beam energies, we cover the energy range between E c.m. = 0.2 and 2.1 MeV. An R-matrix analysis of the data is performed and suggests the existence of two broad overlapping resonances (5/2+ at E c.m. = 1.69 MeV and 7/2 + at E c.m. = 1.76 MeV). At low energies our data are sensitive to the properties of a subthreshold state (E x = 16.67 MeV) and of two resonances above threshold. These resonances were observed in previous experiments. The R-matrix fit confirms spin assignments, and provides partial widths. We propose a new 8 Li(p, α) 5 He reaction rate and briefly discuss its influence in nuclear astrophysics.

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Section: Astrophysical Reaction Ratementioning

confidence: 66%

“…9, which shows that the 8 Li(p, α) 5 He reaction is significantly faster than 8 Li(α, n) 11 B at high temperatures. The 8 Li(α, n) 11 B data of Ishiyama et al [26] would make this difference still larger.…”

Section: Astrophysical Reaction Ratementioning

confidence: 88%

The8Li(p,α)5He reaction at low energies, and
Mendes
¹
,
Lépine‐Szily
²
,
Descouvemont
³

et al. 2012
Phys. Rev. C

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show abstract

“…Its extrapolation (dot-dashed curve) allowed us to evaluate the realistic upper limit of about 1 mb for the mean equivalent total cross section. This represents a negligible systematic increase of the 8 Li(α, n) 11 B cross section value, expected in the range 100 − 600 mb at E cm = 1.05 MeV [16,17,18,19,20,21,22].…”

Section: Measurement Without 4 He Targetmentioning

confidence: 79%

Toward correction-free⁸Li(α,n)¹¹B data at the Gamow energy of explosive nucleosynthesis

Cognata¹,

Zoppo²,

Alba³

et al. 2010

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

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Abstract. The8 Li+ 4 He → 11 B+n reaction inside the center of mass energy region E cm = 0.5 − 2.5 MeV, corresponding to the temperature range T 9 = 1 − 5, is of relevant interest in the fields of nuclear cosmology and nuclear astrophysics. In the context of Big-Bang nucleosynthesis, it has been invoked to overcome the A=8 mass gap; in r-process nucleosynthesis, it is considered a candidate precursor of seed nuclei. In this experimental work, the cross section, summed over all 11 B final bound states, at the energy of 1.05 MeV in the center-of-mass system, is investigated by a correction-free projectile-correlated inclusive neutron measurement. The radioactive 8 Li beam delivered by the EXCYT facility at LNS-Catania is used to induce the inversekinematics reaction process. A zero-energy-threshold 4π detection system is used. Thanks to the improved experimental and analysis procedures, the result obtained in this work represents a strong argument to reopen the debate on the magnitude of the 8 Li(α, n) 11 B reaction rate in explosive astrophysical environments.PACS numbers: 25.60. -t,26.30.-k,26.35.+c

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“…A plot of the current cross section data as taken from Ref. [3], as well as relevant Gamow windows for different temperature regimes, is shown in Figure 1.…”

Section: Astrophysical Motivationmentioning

confidence: 99%

“…Direct measurements (see, for example, Refs. [1,3]) have been limited by beam intensity and detection methods. A more thorough discussion may be found in Ref.…”

Section: Astrophysical Motivationmentioning

confidence: 99%

TACTIC: A New Detector for Tracking in Low Energy Nuclear Astrophysics

Chipps¹,

Amaudruz²,

Buchmann³

et al. 2011

Proceedings of 11th Symposium on Nuclei in the Cosmos — PoS(NIC XI)

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A new measurement of the astrophysical 8Li(α,n)11B reaction

Cited by 27 publications

References 13 publications

The8Li(p,α)5He reaction at low energies, and
Mendes
¹
,
Lépine‐Szily
²
,
Descouvemont
³

et al. 2012
Phys. Rev. C

The8Li(p,α)5He reaction at low energies, and
Mendes
¹
,
Lépine‐Szily
²
,
Descouvemont
³

et al. 2012
Phys. Rev. C

Toward correction-free⁸Li(α,n)¹¹B data at the Gamow energy of explosive nucleosynthesis

TACTIC: A New Detector for Tracking in Low Energy Nuclear Astrophysics

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A new measurement of the astrophysical 8Li(α,n)11B reaction

Cited by 27 publications

References 13 publications

The8Li(p,α)5He reaction at low energies, andMendes1, Lépine‐Szily2, Descouvemont3 et al. 2012Phys. Rev. C

The8Li(p,α)5He reaction at low energies, andMendes1, Lépine‐Szily2, Descouvemont3 et al. 2012Phys. Rev. C

Toward correction-free8Li(α,n)11B data at the Gamow energy of explosive nucleosynthesis

TACTIC: A New Detector for Tracking in Low Energy Nuclear Astrophysics

Contact Info

Product

Resources

About

The8Li(p,α)5He reaction at low energies, and
Mendes
¹
,
Lépine‐Szily
²
,
Descouvemont
³

et al. 2012
Phys. Rev. C

The8Li(p,α)5He reaction at low energies, and
Mendes
¹
,
Lépine‐Szily
²
,
Descouvemont
³

et al. 2012
Phys. Rev. C

Toward correction-free⁸Li(α,n)¹¹B data at the Gamow energy of explosive nucleosynthesis