Consistent analysis of the 2+ excitation of the 12C Hoyle state populated in proton and α-particle inelastic scattering

M. Freer; M. Itoh; T. Kawabata; H. Fujita; H. Akimune; Z. Buthelezi; J. Carter; R. W. Fearick; S. V. Förtsch; M. Fujiwara; U. Garg; N. Hashimoto; K. Kawase; S. Kishi; T. Murakami; K. Nakanishi; Y. Nakatsugawa; B. K. Nayak; R. Neveling; S. Okumura; S. M. Perez; P. Papka; H. Sakaguchi; Y. Sasamoto; F. D. Smit; J. A. Swartz; H. Takeda; S. Terashima; M. Uchida; I. Usman; Y. Yasuda; M. Yosoi; J. Zenihiro

doi:10.1103/PhysRevC.86.034320

Consistent analysis of the 2⁺ excitation of the 12C Hoyle state populated in proton and α-particle inelastic scattering

M. Freer, M. Itoh, T. Kawabata, H. Fujita, H. Akimune, Z. Buthelezi, J. Carter, R. W. Fearick, S. V. Förtsch, M. Fujiwara, U. Garg, N. Hashimoto, K. Kawase, S. Kishi, T. Murakami, K. Nakanishi, Y. Nakatsugawa, B. K. Nayak, R. Neveling, S. OkumuraS. M. Perez, P. Papka, H. Sakaguchi, Y. Sasamoto, F. D. Smit, J. A. Swartz, H. Takeda, S. Terashima, M. Uchida, I. Usman, Y. Yasuda, M. Yosoi, J. Zenihiro

Cyclotron and Radioisotope Center (CYRIC)

Research output: Contribution to journal › Article › peer-review

79 Citations (Scopus)

Abstract

The 12C excitation energy spectra populated in both proton and α-particle inelastic scattering measurements are examined. The data indicate the existence of a 2⁺ state at E_x=9.75(0.15) MeV with a width of 750(150)keV. It is believed that this state corresponds to the 2⁺ excitation of the 7.65 MeV, 0⁺, Hoyle state, which acts as the main path by which carbon is synthesized in stars. A simultaneous R-matrix analysis of the two sets of data indicates that the 2⁺ state possesses a very large α-reduced width, approaching the Wigner limit. This would indicate that the state is associated with a highly clustered structure. The potential geometric arrangements of the clusters is discussed.

Original language	English
Article number	034320
Journal	Physical Review C - Nuclear Physics
Volume	86
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.86.034320
Publication status	Published - 2012 Sept 14

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Freer, M., Itoh, M., Kawabata, T., Fujita, H., Akimune, H., Buthelezi, Z., Carter, J., Fearick, R. W., Förtsch, S. V., Fujiwara, M., Garg, U., Hashimoto, N., Kawase, K., Kishi, S., Murakami, T., Nakanishi, K., Nakatsugawa, Y., Nayak, B. K., Neveling, R., ... Zenihiro, J. (2012). Consistent analysis of the 2⁺ excitation of the 12C Hoyle state populated in proton and α-particle inelastic scattering. Physical Review C - Nuclear Physics, 86(3), Article 034320. https://doi.org/10.1103/PhysRevC.86.034320

@article{2fcb73e145ea4e64a5f38fbadc8ce31b,

title = "Consistent analysis of the 2+ excitation of the 12C Hoyle state populated in proton and α-particle inelastic scattering",

abstract = "The 12C excitation energy spectra populated in both proton and α-particle inelastic scattering measurements are examined. The data indicate the existence of a 2+ state at Ex=9.75(0.15) MeV with a width of 750(150)keV. It is believed that this state corresponds to the 2+ excitation of the 7.65 MeV, 0+, Hoyle state, which acts as the main path by which carbon is synthesized in stars. A simultaneous R-matrix analysis of the two sets of data indicates that the 2+ state possesses a very large α-reduced width, approaching the Wigner limit. This would indicate that the state is associated with a highly clustered structure. The potential geometric arrangements of the clusters is discussed.",

author = "M. Freer and M. Itoh and T. Kawabata and H. Fujita and H. Akimune and Z. Buthelezi and J. Carter and Fearick, {R. W.} and F{\"o}rtsch, {S. V.} and M. Fujiwara and U. Garg and N. Hashimoto and K. Kawase and S. Kishi and T. Murakami and K. Nakanishi and Y. Nakatsugawa and Nayak, {B. K.} and R. Neveling and S. Okumura and Perez, {S. M.} and P. Papka and H. Sakaguchi and Y. Sasamoto and Smit, {F. D.} and Swartz, {J. A.} and H. Takeda and S. Terashima and M. Uchida and I. Usman and Y. Yasuda and M. Yosoi and J. Zenihiro",

year = "2012",

month = sep,

day = "14",

doi = "10.1103/PhysRevC.86.034320",

language = "English",

volume = "86",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

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Freer, M, Itoh, M, Kawabata, T, Fujita, H, Akimune, H, Buthelezi, Z, Carter, J, Fearick, RW, Förtsch, SV, Fujiwara, M, Garg, U, Hashimoto, N, Kawase, K, Kishi, S, Murakami, T, Nakanishi, K, Nakatsugawa, Y, Nayak, BK, Neveling, R, Okumura, S, Perez, SM, Papka, P, Sakaguchi, H, Sasamoto, Y, Smit, FD, Swartz, JA, Takeda, H, Terashima, S, Uchida, M, Usman, I, Yasuda, Y, Yosoi, M & Zenihiro, J 2012, 'Consistent analysis of the 2⁺ excitation of the 12C Hoyle state populated in proton and α-particle inelastic scattering', Physical Review C - Nuclear Physics, vol. 86, no. 3, 034320. https://doi.org/10.1103/PhysRevC.86.034320

TY - JOUR

T1 - Consistent analysis of the 2+ excitation of the 12C Hoyle state populated in proton and α-particle inelastic scattering

AU - Freer, M.

AU - Itoh, M.

AU - Kawabata, T.

AU - Fujita, H.

AU - Akimune, H.

AU - Buthelezi, Z.

AU - Carter, J.

AU - Fearick, R. W.

AU - Förtsch, S. V.

AU - Fujiwara, M.

AU - Garg, U.

AU - Hashimoto, N.

AU - Kawase, K.

AU - Kishi, S.

AU - Murakami, T.

AU - Nakanishi, K.

AU - Nakatsugawa, Y.

AU - Nayak, B. K.

AU - Neveling, R.

AU - Okumura, S.

AU - Perez, S. M.

AU - Papka, P.

AU - Sakaguchi, H.

AU - Sasamoto, Y.

AU - Smit, F. D.

AU - Swartz, J. A.

AU - Takeda, H.

AU - Terashima, S.

AU - Uchida, M.

AU - Usman, I.

AU - Yasuda, Y.

AU - Yosoi, M.

AU - Zenihiro, J.

PY - 2012/9/14

Y1 - 2012/9/14

N2 - The 12C excitation energy spectra populated in both proton and α-particle inelastic scattering measurements are examined. The data indicate the existence of a 2+ state at Ex=9.75(0.15) MeV with a width of 750(150)keV. It is believed that this state corresponds to the 2+ excitation of the 7.65 MeV, 0+, Hoyle state, which acts as the main path by which carbon is synthesized in stars. A simultaneous R-matrix analysis of the two sets of data indicates that the 2+ state possesses a very large α-reduced width, approaching the Wigner limit. This would indicate that the state is associated with a highly clustered structure. The potential geometric arrangements of the clusters is discussed.

AB - The 12C excitation energy spectra populated in both proton and α-particle inelastic scattering measurements are examined. The data indicate the existence of a 2+ state at Ex=9.75(0.15) MeV with a width of 750(150)keV. It is believed that this state corresponds to the 2+ excitation of the 7.65 MeV, 0+, Hoyle state, which acts as the main path by which carbon is synthesized in stars. A simultaneous R-matrix analysis of the two sets of data indicates that the 2+ state possesses a very large α-reduced width, approaching the Wigner limit. This would indicate that the state is associated with a highly clustered structure. The potential geometric arrangements of the clusters is discussed.

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UR - http://www.scopus.com/inward/citedby.url?scp=84866674703&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.86.034320

DO - 10.1103/PhysRevC.86.034320

M3 - Article

AN - SCOPUS:84866674703

SN - 0556-2813

VL - 86

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 3

M1 - 034320

ER -

Consistent analysis of the 2⁺ excitation of the 12C Hoyle state populated in proton and α-particle inelastic scattering

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