<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math>decay of the excited states in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>12</mml:mn></mml:msup></mml:math>C at 7.65 and 9.64 MeV

Manfredi, J.; Charity, R. J.; Mercurio, K.; Shane, R.; Sobotka, L. G.; Wuosmaa, A. H.; Banu, A.; Trache, L.; Tribble, R. E.

doi:10.1103/physrevc.85.037603

Cited by 60 publications

(56 citation statements)

References 7 publications

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“…However, it was inconsistent with the result of the first experiment by Freer et al This inconsistency has been tested by two experiments at first. One is the analysis of the 10 C + C (Be) reaction by Manfredi et al [8]. They obtained the upper limit of the 3.9 % for the direct decay from the Hoyle state, which was consistent with the result of the first experiment by Freer et al Another is the experiment of the 11 B( 3 He, d3α) reaction by Kirsebom et al [9].…”

Section: Introductionsupporting

confidence: 72%

Measurement of the 3-α decay from the Hoyle and the broad 10 MeV states in¹²C

Itoh

Ando

Aoki

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. The measurements of the 3-α decay from the Hoyle and the broad 10 MeV state in 12 C have been performed using an inverse kinematic method of the 12 C( 12 C,3α) 12 C reaction at E12 C = 110 MeV. In the measurement of the Hoyle state, the upper limit of the direct decay was improved to be 0.2 %. This was inconsistent with the recent reported nonzero value of 0.9 %, but an order larger than the direct decay branch predicted in the 3-α model. The branching ratios of the sequtial decay for the broad 10 MeV state were also obtained. They were higher than those obtained in the RCNP experiment, since they contained the contributions of higer multipole components. Their contributions will be estimated.

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Section: Introductionsupporting

confidence: 72%

Measurement of the 3-α decay from the Hoyle and the broad 10 MeV states in¹²C

Itoh

Ando

Aoki

et al. 2017

J. Phys.: Conf. Ser.

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“…In the same experiment the breakup of the (0 + , 0) state at 7.65 MeV was shown to be primarily sequential [12]; see also refs. [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Complete kinematical study of the 3 $\alpha$ breakup of the 16.11 MeV state in 12C

et al. 2016

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Abstract. The reaction11 B + p has been used to populate the (J π , T ) = (2 + , 1) state at an excitation energy of 16.11 MeV in 12 C, and the breakup of the state into three α-particles has been studied in complete kinematics. A two-step breakup model which includes interference effects is found to provide the most accurate description of the experimental data. The branching ratio to the ground state of 8 Be is determined to be 5.1(5)% in agreement with previous findings, but more precise by a factor of two, while the decay to the first excited state in 8 Be is found to be dominated by d-wave emission.

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“…Recently, a quite large number of experiments have been performed in order to measure the DD width of the Hoyle state [16][17][18][19][20][21]. Anyway, the picture resulting from these experiments is quite complicated, see Ref.…”

Section: Introductionmentioning

confidence: 99%

A new high-precision upper limit of direct α-decays from the Hoyle state in ¹²C

et al. 2017

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Abstract. The Hoyle state in 12 C (E x = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12 C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14 N(d, α 2 ) 12 C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8 Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised.

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αdecay of the excited states in12C at 7.65 and 9.64 MeV

Cited by 60 publications

References 7 publications

Measurement of the 3-α decay from the Hoyle and the broad 10 MeV states in¹²C

Measurement of the 3-α decay from the Hoyle and the broad 10 MeV states in¹²C

Complete kinematical study of the 3 $\alpha$ breakup of the 16.11 MeV state in 12C

A new high-precision upper limit of direct α-decays from the Hoyle state in ¹²C

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αdecay of the excited states in12C at 7.65 and 9.64 MeV

Cited by 60 publications

References 7 publications

Measurement of the 3-α decay from the Hoyle and the broad 10 MeV states in12C

Measurement of the 3-α decay from the Hoyle and the broad 10 MeV states in12C

Complete kinematical study of the 3 $\alpha$ breakup of the 16.11 MeV state in 12C

A new high-precision upper limit of direct α-decays from the Hoyle state in 12C

Contact Info

Product

Resources

About

Measurement of the 3-α decay from the Hoyle and the broad 10 MeV states in¹²C

Measurement of the 3-α decay from the Hoyle and the broad 10 MeV states in¹²C

A new high-precision upper limit of direct α-decays from the Hoyle state in ¹²C