Measurements of ISGMR in Sn, Cd and Pb isotopes and the asymmetry of nuclear matter incompressibility

M. Fujiwara; T. Li; D. Patel; U. Garg; G. P.A. Berg; Y. Liu; R. Marks; J. Matta; B. K. Nayak; P. V. Madhusudhana-Rao; A. Long; K. Sault; R. Talwar; H. Hashimoto; K. Nakanishi; S. Okumura; M. Yosoi; M. Ichikawa; M. Itoh; R. Matsuo; T. Terazono; M. Uchida; Y. Iwao; T. Kawabata; T. Murakami; H. Sakaguchi; S. Terashima; Y. Yasuda; J. Zenihiro; H. Akimune; C. Iwamoto; A. Okamoto; K. Kawase; T. Adachi; M. N. Harakeh

doi:10.1063/1.3628374

Measurements of ISGMR in Sn, Cd and Pb isotopes and the asymmetry of nuclear matter incompressibility

M. Fujiwara, T. Li, D. Patel, U. Garg, G. P.A. Berg, Y. Liu, R. Marks, J. Matta, B. K. Nayak, P. V. Madhusudhana-Rao, A. Long, K. Sault, R. Talwar, H. Hashimoto, K. Nakanishi, S. Okumura, M. Yosoi, M. Ichikawa, M. Itoh, R. MatsuoT. Terazono, M. Uchida, Y. Iwao, T. Kawabata, T. Murakami, H. Sakaguchi, S. Terashima, Y. Yasuda, J. Zenihiro, H. Akimune, C. Iwamoto, A. Okamoto, K. Kawase, T. Adachi, M. N. Harakeh

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The compression-mode isoscalar giant monopole resonance (ISGMR) has been studied in the Sn, Cd and Pb isotopes using inelastic scattering of 400 MeV α-particles at extreme forward angles, including 0°. We have obtained completely "background-free" inelastic-scattering spectra for the Sn, Cd, and Pb isotopes for a wide angular and excitation-energy range. The various giant resonances excited with different transferred angular momenta were extracted by a multipole-decomposition analysis (MDA). It was found that the centroid energies of the ISGMR in Sn isotopes are significantly lower than the theoretical predictions. The K_τ in the empirical expression for the nuclear incompressibility has been determined to be K_τ=- 550±100MeV for the Sn isotopes. The extracted value for the Cd isotopes is K_τ=-480±100MeV. These numbers are consistent with values of K_τ=-370±120MeV obtained from an analysis of the isotopic transport ratios in medium-energy heavy-ion reactions, K _τ=-500_-100⁺¹²⁰MeV obtained from constraints placed by neutron-skin data from anti-protonic atoms across the mass table, and K_τ=-500±50MeV obtained from theoretical calculations using different Skyrme interactions and relativistic mean field (RMF) Lagrangians. Stringent constraints on interactions employed in nuclear structure calculations are obtained on the basis of the experimentally determined values for K_∞ and K_τ. These parameters constrain as well the equation of state (EOS) of nuclear matter. However, a significant discrepancy still remains. The ISGMR positions in Sn and Cd isotopes are systematically lower than the predictions obtained on basis of determined from the ISGMR in ²⁰⁸Pb. This raises the question "Why are Sn and Cd nuclei so soft?". For a clue to solve the problem, we discuss the preliminary results on the exact positions of the ISGMR in ^204,206,208Pb.

Original language	English
Title of host publication	Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3
Pages	164-171
Number of pages	8
DOIs	https://doi.org/10.1063/1.3628374
State	Published - 2011
Externally published	Yes
Event	3rd International Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3 - Rhodes, Greece Duration: Aug 23 2010 → Aug 27 2010

Publication series

Name	AIP Conference Proceedings
Volume	1377
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	3rd International Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3
Country/Territory	Greece
City	Rhodes
Period	08/23/10 → 08/27/10

Keywords

ISGMR
Nuclear Incompressibility
inelastic α scattering

Access to Document

10.1063/1.3628374

Cite this

Fujiwara, M., Li, T., Patel, D., Garg, U., Berg, G. P. A., Liu, Y., Marks, R., Matta, J., Nayak, B. K., Madhusudhana-Rao, P. V., Long, A., Sault, K., Talwar, R., Hashimoto, H., Nakanishi, K., Okumura, S., Yosoi, M., Ichikawa, M., Itoh, M., ... Harakeh, M. N. (2011). Measurements of ISGMR in Sn, Cd and Pb isotopes and the asymmetry of nuclear matter incompressibility. In Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3 (pp. 164-171). (AIP Conference Proceedings; Vol. 1377). https://doi.org/10.1063/1.3628374

@inproceedings{f360e167c75a4971be970d7b4621949d,

title = "Measurements of ISGMR in Sn, Cd and Pb isotopes and the asymmetry of nuclear matter incompressibility",

abstract = "The compression-mode isoscalar giant monopole resonance (ISGMR) has been studied in the Sn, Cd and Pb isotopes using inelastic scattering of 400 MeV α-particles at extreme forward angles, including 0°. We have obtained completely {"}background-free{"} inelastic-scattering spectra for the Sn, Cd, and Pb isotopes for a wide angular and excitation-energy range. The various giant resonances excited with different transferred angular momenta were extracted by a multipole-decomposition analysis (MDA). It was found that the centroid energies of the ISGMR in Sn isotopes are significantly lower than the theoretical predictions. The Kτ in the empirical expression for the nuclear incompressibility has been determined to be Kτ=- 550±100MeV for the Sn isotopes. The extracted value for the Cd isotopes is Kτ=-480±100MeV. These numbers are consistent with values of Kτ=-370±120MeV obtained from an analysis of the isotopic transport ratios in medium-energy heavy-ion reactions, K τ=-500-100+120MeV obtained from constraints placed by neutron-skin data from anti-protonic atoms across the mass table, and Kτ=-500±50MeV obtained from theoretical calculations using different Skyrme interactions and relativistic mean field (RMF) Lagrangians. Stringent constraints on interactions employed in nuclear structure calculations are obtained on the basis of the experimentally determined values for K∞ and Kτ. These parameters constrain as well the equation of state (EOS) of nuclear matter. However, a significant discrepancy still remains. The ISGMR positions in Sn and Cd isotopes are systematically lower than the predictions obtained on basis of determined from the ISGMR in 208Pb. This raises the question {"}Why are Sn and Cd nuclei so soft?{"}. For a clue to solve the problem, we discuss the preliminary results on the exact positions of the ISGMR in 204,206,208Pb.",

keywords = "ISGMR, Nuclear Incompressibility, inelastic α scattering",

author = "M. Fujiwara and T. Li and D. Patel and U. Garg and Berg, {G. P.A.} and Y. Liu and R. Marks and J. Matta and Nayak, {B. K.} and Madhusudhana-Rao, {P. V.} and A. Long and K. Sault and R. Talwar and H. Hashimoto and K. Nakanishi and S. Okumura and M. Yosoi and M. Ichikawa and M. Itoh and R. Matsuo and T. Terazono and M. Uchida and Y. Iwao and T. Kawabata and T. Murakami and H. Sakaguchi and S. Terashima and Y. Yasuda and J. Zenihiro and H. Akimune and C. Iwamoto and A. Okamoto and K. Kawase and T. Adachi and Harakeh, {M. N.}",

year = "2011",

doi = "10.1063/1.3628374",

language = "English",

isbn = "9780735409378",

series = "AIP Conference Proceedings",

pages = "164--171",

booktitle = "Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3",

note = "3rd International Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3 ; Conference date: 23-08-2010 Through 27-08-2010",

}

Fujiwara, M, Li, T, Patel, D, Garg, U, Berg, GPA, Liu, Y, Marks, R, Matta, J, Nayak, BK, Madhusudhana-Rao, PV, Long, A, Sault, K, Talwar, R, Hashimoto, H, Nakanishi, K, Okumura, S, Yosoi, M, Ichikawa, M, Itoh, M, Matsuo, R, Terazono, T, Uchida, M, Iwao, Y, Kawabata, T, Murakami, T, Sakaguchi, H, Terashima, S, Yasuda, Y, Zenihiro, J, Akimune, H, Iwamoto, C, Okamoto, A, Kawase, K, Adachi, T & Harakeh, MN 2011, Measurements of ISGMR in Sn, Cd and Pb isotopes and the asymmetry of nuclear matter incompressibility. in Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3. AIP Conference Proceedings, vol. 1377, pp. 164-171, 3rd International Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3, Rhodes, Greece, 08/23/10. https://doi.org/10.1063/1.3628374

Measurements of ISGMR in Sn, Cd and Pb isotopes and the asymmetry of nuclear matter incompressibility. / Fujiwara, M.; Li, T.; Patel, D. et al.
Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3. 2011. p. 164-171 (AIP Conference Proceedings; Vol. 1377).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Measurements of ISGMR in Sn, Cd and Pb isotopes and the asymmetry of nuclear matter incompressibility

AU - Fujiwara, M.

AU - Li, T.

AU - Patel, D.

AU - Garg, U.

AU - Berg, G. P.A.

AU - Liu, Y.

AU - Marks, R.

AU - Matta, J.

AU - Nayak, B. K.

AU - Madhusudhana-Rao, P. V.

AU - Long, A.

AU - Sault, K.

AU - Talwar, R.

AU - Hashimoto, H.

AU - Nakanishi, K.

AU - Okumura, S.

AU - Yosoi, M.

AU - Ichikawa, M.

AU - Itoh, M.

AU - Matsuo, R.

AU - Terazono, T.

AU - Uchida, M.

AU - Iwao, Y.

AU - Kawabata, T.

AU - Murakami, T.

AU - Sakaguchi, H.

AU - Terashima, S.

AU - Yasuda, Y.

AU - Zenihiro, J.

AU - Akimune, H.

AU - Iwamoto, C.

AU - Okamoto, A.

AU - Kawase, K.

AU - Adachi, T.

AU - Harakeh, M. N.

PY - 2011

Y1 - 2011

N2 - The compression-mode isoscalar giant monopole resonance (ISGMR) has been studied in the Sn, Cd and Pb isotopes using inelastic scattering of 400 MeV α-particles at extreme forward angles, including 0°. We have obtained completely "background-free" inelastic-scattering spectra for the Sn, Cd, and Pb isotopes for a wide angular and excitation-energy range. The various giant resonances excited with different transferred angular momenta were extracted by a multipole-decomposition analysis (MDA). It was found that the centroid energies of the ISGMR in Sn isotopes are significantly lower than the theoretical predictions. The Kτ in the empirical expression for the nuclear incompressibility has been determined to be Kτ=- 550±100MeV for the Sn isotopes. The extracted value for the Cd isotopes is Kτ=-480±100MeV. These numbers are consistent with values of Kτ=-370±120MeV obtained from an analysis of the isotopic transport ratios in medium-energy heavy-ion reactions, K τ=-500-100+120MeV obtained from constraints placed by neutron-skin data from anti-protonic atoms across the mass table, and Kτ=-500±50MeV obtained from theoretical calculations using different Skyrme interactions and relativistic mean field (RMF) Lagrangians. Stringent constraints on interactions employed in nuclear structure calculations are obtained on the basis of the experimentally determined values for K∞ and Kτ. These parameters constrain as well the equation of state (EOS) of nuclear matter. However, a significant discrepancy still remains. The ISGMR positions in Sn and Cd isotopes are systematically lower than the predictions obtained on basis of determined from the ISGMR in 208Pb. This raises the question "Why are Sn and Cd nuclei so soft?". For a clue to solve the problem, we discuss the preliminary results on the exact positions of the ISGMR in 204,206,208Pb.

AB - The compression-mode isoscalar giant monopole resonance (ISGMR) has been studied in the Sn, Cd and Pb isotopes using inelastic scattering of 400 MeV α-particles at extreme forward angles, including 0°. We have obtained completely "background-free" inelastic-scattering spectra for the Sn, Cd, and Pb isotopes for a wide angular and excitation-energy range. The various giant resonances excited with different transferred angular momenta were extracted by a multipole-decomposition analysis (MDA). It was found that the centroid energies of the ISGMR in Sn isotopes are significantly lower than the theoretical predictions. The Kτ in the empirical expression for the nuclear incompressibility has been determined to be Kτ=- 550±100MeV for the Sn isotopes. The extracted value for the Cd isotopes is Kτ=-480±100MeV. These numbers are consistent with values of Kτ=-370±120MeV obtained from an analysis of the isotopic transport ratios in medium-energy heavy-ion reactions, K τ=-500-100+120MeV obtained from constraints placed by neutron-skin data from anti-protonic atoms across the mass table, and Kτ=-500±50MeV obtained from theoretical calculations using different Skyrme interactions and relativistic mean field (RMF) Lagrangians. Stringent constraints on interactions employed in nuclear structure calculations are obtained on the basis of the experimentally determined values for K∞ and Kτ. These parameters constrain as well the equation of state (EOS) of nuclear matter. However, a significant discrepancy still remains. The ISGMR positions in Sn and Cd isotopes are systematically lower than the predictions obtained on basis of determined from the ISGMR in 208Pb. This raises the question "Why are Sn and Cd nuclei so soft?". For a clue to solve the problem, we discuss the preliminary results on the exact positions of the ISGMR in 204,206,208Pb.

KW - ISGMR

KW - Nuclear Incompressibility

KW - inelastic α scattering

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U2 - 10.1063/1.3628374

DO - 10.1063/1.3628374

M3 - Conference contribution

AN - SCOPUS:81555212734

SN - 9780735409378

T3 - AIP Conference Proceedings

SP - 164

EP - 171

BT - Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3

T2 - 3rd International Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 3

Y2 - 23 August 2010 through 27 August 2010

ER -

Measurements of ISGMR in Sn, Cd and Pb isotopes and the asymmetry of nuclear matter incompressibility

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Keywords

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