<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math>decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>into the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>α</mml:mi><mml:mo>+</mml:mo><mml:mi>d</mml:mi></mml:mrow></mml:math>continuum

Pfützner, M.; Dominik, W.; Janas, Z.; Mazzocchi, C.; Pomorski, M.; Bezbakh, A. A.; Borge, M. J. G.; Chrapkiewicz, Kajetan; Chudoba, V.; Frederickx, Roald; Kamiński, G.; Kowalska, Magdalena; Krupko, S. A.; Kuich, M.; Kurcewicz, J.; Lis, A. A.; Lund, M. V.; Miernik, K.; Perkowski, J.; Raabe, R.; Randisi, G.; Riisager, K.; Sambi, S.; Tengblad, O.; Wenander, F.

doi:10.1103/physrevc.92.014316

Cited by 17 publications

(16 citation statements)

References 23 publications

(76 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hc, 21.45.+v, 21.60.Gx, 27.20.+n The β-delayed deuteron decay of 6 He, i.e. the β decay of 6 He into 4 He and a deuteron,has been measured several times with various results for its very small branching ratio [1][2][3][4][5]. The smallness of the branching was first explained as a cancellation between the internal and halo parts of the Gamow-Teller matrix element by a semi-microscopic model in Ref.…”

mentioning

confidence: 99%

“…[8], while the shape of the spectrum is in excellent agreement with theory. The aim of the present report is to update the theoretical model [7,8] and describe the new experimental data [5] with high precision. We also discuss expectations for theoretical progress.…”

mentioning

confidence: 99%

“…The second measurement [5] was performed in 2015 by the same collaboration at the REX-ISOLDE facility. The * Electronic address: tursune@inp.uz † Electronic address: dbaye@ulb.ac.be ‡ Electronic address: pdesc@ulb.ac.be 6 He ions were implanted into the optical time projection chamber, where the decays with emission of charged particles were recorded.…”

mentioning

confidence: 99%

“…The branching ratio that we obtained in a three-body model [7,8] agreed with the data of the most recent experiment at that time [3]. This is due to a good description of the ground-state energy and halo of 6 He with an α + n + n wave function and to a potential fitting the α + d s-wave phase shift and the normalization of the experimental curve.Since the publication of our calculation [7,8], two measurements [4,5] were performed, which update the experimental data and challenge our theoretical transition probabilities of the process. The first measurement by the ISOLDE collaboration in 2009 [4] used the technique of implantation into a highly segmented silicon detector.…”

mentioning

confidence: 99%

“…Since the publication of our calculation [7,8], two measurements [4,5] were performed, which update the experimental data and challenge our theoretical transition probabilities of the process. The first measurement by the ISOLDE collaboration in 2009 [4] used the technique of implantation into a highly segmented silicon detector.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Updated three-body model of He6β decay into the α+d continuum

2018

View full text Add to dashboard Cite

The β-decay process of the 6 He halo nucleus into the α + d continuum is studied in an updated three-body model. The 6 He nucleus is described as an α+n+n system in hyperspherical coordinates on a Lagrange-mesh. The shape and absolute values of the transition probability per time and energy units of new experiments are reproduced with a modified α + d potential. The obtained total transition probabilities are 2.48 × 10 −6 s −1 for the full energy region and 2.40 × 10 −6 s −1 for the cut-off E > 150 keV. The strong cancellation between the internal and halo parts of the β decay matrix element is a challenge for future ab initio calculations.PACS numbers: 23.40. Hc, 21.45.+v, 21.60.Gx, 27.20.+n The β-delayed deuteron decay of 6 He, i.e. the β decay of 6 He into 4 He and a deuteron,has been measured several times with various results for its very small branching ratio [1][2][3][4][5]. The smallness of the branching was first explained as a cancellation between the internal and halo parts of the Gamow-Teller matrix element by a semi-microscopic model in Ref. [6]. This interpretation was confirmed by later models (see references in Ref. [7]) but all results are very sensitive to tiny details. The branching ratio that we obtained in a three-body model [7,8] agreed with the data of the most recent experiment at that time [3]. This is due to a good description of the ground-state energy and halo of 6 He with an α + n + n wave function and to a potential fitting the α + d s-wave phase shift and the normalization of the experimental curve.Since the publication of our calculation [7,8], two measurements [4,5] were performed, which update the experimental data and challenge our theoretical transition probabilities of the process. The first measurement by the ISOLDE collaboration in 2009 [4] used the technique of implantation into a highly segmented silicon detector. A branching ratio B = (1.65 ± 0.10) × 10 −6 was obtained for deuterons with energies above 350 keV with a 6% error. The corresponding transition probability is W = (1.42±0.09)×10 −6 s −1 for E d > 350 keV. The data slightly underestimates our previous theoretical results, 2.04 × 10 −6 s −1 for the full energy range or 1.59 × 10 . The shape of the spectrum is found to be in a good agreement with the three-body model [7,8], while the total transition probability is [2.39±0.06(stat)±0.15(sys)]×10which is about 20% larger than our theoretical prediction of Ref.[8], while the shape of the spectrum is in excellent agreement with theory. The aim of the present report is to update the theoretical model [7,8] and describe the new experimental data [5] with high precision. We also discuss expectations for theoretical progress. The 6 He nucleus is described as an α + n + n system in hyperspherical coordinates on a Lagrange mesh (see Ref.[9] for details). The ground-state wave function Ψ6 He (r, R) is then expressed and normalized in Jacobi coordinates: r between the neutrons and R between the α core and the center of mass of these neutrons. The transition probability p...

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%