<math><mmultiscripts><mi mathvariant="normal">B</mi><mprescripts/><none/><mn>11</mn></mmultiscripts></math> states above the <math><mi>α</mi></math>-decay threshold via the <math><mrow><mmultiscripts><mi mathvariant="normal">B</mi><mprescripts/><none/><mn>10</mn></mmultiscripts><mrow><mo>(</mo><mi>d</mi><mo>,</mo><mi>p</mi><mo>)</mo></mrow><mmultiscripts><mi mathvariant="normal">B</mi><mprescripts/><none/><mrow><mn>11</mn></mrow></mmultiscripts></mrow></math> reaction

Kuchera, A.N.; Ryan, G.; Selby, G.; Snider, D.; Anderson, S.; Almaraz-Calderon, S.; Baby, L.T.; Brown, B.A.; Hanselman, K.; Lopez-Saavedra, E.

doi:10.1103/PhysRevC.110.054319

${}^{11}B$ states above the $α$ -decay threshold via the ${}^{10}B (d, p) {}^{11}B$ reaction

Nov 14, 2024

7 pages

Published in:

Phys.Rev.C 110 (2024) 5, 054319

Published: Nov 19, 2024

e-Print:

2411.09831 [nucl-ex]

DOI:

10.1103/PhysRevC.110.054319 (publication)

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Abstract: (APS)

The resonance region of

{}^{11}B

covering excitation energies from 8.4 to 13.6 MeV was investigated with the

(d, p)

reaction performed on an enriched

{}^{10}B

target at the Florida State University Super-Enge Split-Pole Spectrograph of the John D. Fox Superconducting Linear Accelerator Laboratory. Complementary measurements were performed with a target enriched in

{}^{11}B

to identify possible

{}^{12}B

contaminants in the

(d, p)

reaction. Four strongly populated

{}^{11}B

states were observed above the

α

-decay threshold. Angular distributions were measured and compared to distorted wave Born approximation (DWBA) calculations to extract angular momentum transfers and

{}^{10}B (3^{+}) + n

spectroscopic factors. The recently observed and heavily discussed resonance at 11.4 MeV in

{}^{11}B

was not observed in this work. This result is consistent with the interpretation that it is predominantly a

{}^{10}{Be} (0^{+}) + p

resonance with a possible additional

{}^{7}{Li} + α

contribution. The predicted

{}^{10}B (3^{+}) + n

resonance at 11.6 MeV, analogous to the 11.4-MeV proton resonance, was not observed either. Upper limits for the

{}^{10}B (3^{+}) + n

spectroscopic factors of the 11.4- and 11.6-MeV states were determined. In addition, supporting configuration interaction shell model calculations with the effective WBP interaction are presented.

Note:

7 pages, 3 figures, accepted for publication in Physical Review C as regular article

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B11 states above the α-decay threshold via the B10(d,p)B11 reaction

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${}^{11}B$ states above the $α$ -decay threshold via the ${}^{10}B (d, p) {}^{11}B$ reaction