In flight production of a 8Li radioactive beam for Big Bang nucleosynthesis investigations at LNS Catania

Agodi, C.; Alba, R.; Calabretta, L.; Cherubini, S.; Coséntino, L.; Zoppo, A. Del; Pietro, A. Di; Figuera, P.; Gulino, M.; Musumarra, A.; Pizzone, R. G.; Rolfs, C.; Romano, S.; Spitaleri, C.; Tudisco, S.; Туміно, А.

doi:10.1016/j.nima.2006.06.053

Cited by 6 publications

(4 citation statements)

References 34 publications

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“…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: 80%

“…Its extrapolation (dotted-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]. The measurement without 4 He was then performed to exclude the existence of additional, a priori unexpected, strong correlated background contributions attributable to the beam transit nearby and/or inside the gas target cell.…”

Section: Measurement Without the 4 He Targetmentioning

confidence: 99%

“…Available cross section data at center-of-mass (c.o.m.) energies of about 1 MeV range from about 100 to 600 mb [16][17][18][19][20][21][22]. Consequently, a more accurate experimental determination of the 8 Li+ 4 He → 11 B+n reaction cross section is needed.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Measurement Without 4 He Targetmentioning

confidence: 80%

Section: Measurement Without the 4 He Targetmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Indeed, the TRIUMF accelerator successfully produced 8 He by using 60 μA of primary proton beam accelerated by a cyclotron interacting with a SiC target, with an intensity of ∼10 4 pps (Holl et al 2021). The LNS accelerator, in Catania, produced 8 Li using the reaction 7 Li( 2 H, p) 8 Li (Agodi et al 2006). This reaction, which has a high cross-section (Schilling et al 1976), can be used either with a 2 H beam, or with a 7 Li beam (inverse kinematics).…”

Section: Producing and Accelerating 8 LI And 8 Hementioning

confidence: 99%

Short-lived radioactive ⁸Li and ⁸He ions for hadrontherapy: a simulation study

et al. 2023

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Purpose: Although hadrontherapy for cancer treatment has grown in popularity these past years, the use of protons and carbon ions for therapy remains debated compared to X-ray therapy. While a biological advantage of protons is not clearly demonstrated, therapy using carbon ions is often criticized for its high cost. Furthermore, the nuclear interactions undergone by carbons inside the patient are responsible for an additional dose delivered after the Bragg peak (BP). Therefore, a renewed interest in lighter ions with higher biological efficiency than protons was recently observed. In this context, helium and lithium ions represent a good compromise between protons and carbons, as they exhibit a higher LET than protons in the Bragg peak and can be accelerated by cyclotrons. The possibility of accelerating radioactive 8Li, decaying in 2 α-particles, and 8He, decaying in 8Li by β- decay, is particularly interesting. Method: This work aims to assess the pertinence of the use of 8Li and 8He ions for therapy by Monte Carlo simulations carried out with GEANT4. Results: It was calculated that the 8Li and 8He decay results in an increase of the LET of almost a factor 2 in the BP compared to stable 7Li and 4He. This also results in a higher dose deposited in the BP without an increase of the dose in the plateau region, and a lower dose after the BP due to fragmentation. It was also shown that both 8He and 8Li can have potential interest for prompt-gamma monitoring techniques. Finally, the feasibility of accelerating facilities delivering 8Li and 8He was also discussed. Conclusion: In this study, we demonstrate that both 8Li and 8He have interesting properties for therapy. Indeed, simulations predict that 8Li and 8He are a good compromise between proton and 12C, both in terms of LET and dose.

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4π Neutron detection with low-intensity radioactive beams

Zoppo

Figuera

Musumarra

et al. 2007

Nuclear Instruments and Methods in Physics Research Section A:

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In flight production of a 8Li radioactive beam for Big Bang nucleosynthesis investigations at LNS Catania

Cited by 6 publications

References 34 publications

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

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

Short-lived radioactive ⁸Li and ⁸He ions for hadrontherapy: a simulation study

4π Neutron detection with low-intensity radioactive beams

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In flight production of a 8Li radioactive beam for Big Bang nucleosynthesis investigations at LNS Catania

Cited by 6 publications

References 34 publications

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

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

Short-lived radioactive 8Li and 8He ions for hadrontherapy: a simulation study

4π Neutron detection with low-intensity radioactive beams

Contact Info

Product

Resources

About

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

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

Short-lived radioactive ⁸Li and ⁸He ions for hadrontherapy: a simulation study