Momentum sharing in imbalanced Fermi systems

被引：252

作者：

Hen, O. ^{[1
]}

Sargsian, M. ^{[2
]}

Weinstein, L. B. ^{[3
]}

Piasetzky, E. ^{[1
]}

Hakobyan, H. ^{[4
,5
]}

Higinbotham, D. W. ^{[6
]}

Braverman, M. ^{[1
]}

Brooks, W. K. ^{[4
]}

Gilad, S. ^{[7
]}

Adhikari, K. P. ^{[3
]}

Arrington, J. ^{[8
]}

Asryan, G. ^{[5
]}

Avakian, H. ^{[6
]}

Ball, J. ^{[9
]}

Baltzell, N. A. ^{[8
]}

Battaglieri, M. ^{[10
]}

Beck, A. ^{[1
,11
]}

Beck, S. May-Tal ^{[1
,11
]}

Bedlinskiy, I. ^{[12
]}

Bertozzi, W. ^{[7
]}

Biselli, A. ^{[13
]}

Burkert, V. D. ^{[6
]}

Cao, T. ^{[14
]}

Carman, D. S. ^{[6
]}

Celentano, A. ^{[10
]}

Chandavar, S. ^{[15
]}

Colaneri, L. ^{[16
]}

Cole, P. L. ^{[6
,17
,18
]}

Crede, V. ^{[19
]}

D'Angelo, A. ^{[16
,20
]}

De Vita, R. ^{[10
]}

Deur, A. ^{[6
]}

Djalali, C. ^{[14
,21
]}

Doughty, D. ^{[6
,22
]}

Dugger, M. ^{[23
]}

Dupre, R. ^{[24
]}

Egiyan, H. ^{[6
]}

El Alaoui, A. ^{[8
]}

El Fassi, L. ^{[3
]}

Elouadrhiri, L. ^{[6
]}

Fedotov, G. ^{[14
,25
]}

Fegan, S. ^{[10
]}

Forest, T. ^{[17
]}

Garillon, B. ^{[24
]}

Garcon, M. ^{[9
]}

Gevorgyan, N. ^{[5
]}

Ghandilyan, Y. ^{[5
]}

Gilfoyle, G. P. ^{[26
]}

Girod, F. X. ^{[6
]}

Goetz, J. T. ^{[15
]}

机构：

[1] Tel Aviv Univ, IL-69978 Tel Aviv, Israel

[2] Florida Int Univ, Miami, FL 33199 USA

[3] Old Dominion Univ, Norfolk, VA 23529 USA

[4] Univ Tecn Federico Santa Maria, Valparaiso, Chile

[5] Yerevan Phys Inst, Yerevan 375036, Armenia

[6] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[7] MIT, Cambridge, MA 02139 USA

[8] Argonne Natl Lab, Argonne, IL 60439 USA

[9] Ctr Saclay, Irfu, Commissariat Energie Atom & Energies Alternat, Serv Phys Nucl, F-91191 Gif Sur Yvette, France

[10] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

[11] Nucl Res Ctr Negev, IL-84190 Beer Sheva, Israel

[12] Inst Theoret & Expt Phys, Moscow 117259, Russia

[13] Fairfield Univ, Fairfield, CT 06824 USA

[14] Univ S Carolina, Columbia, SC 29208 USA

[15] Ohio Univ, Athens, OH 45701 USA

[16] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[17] Idaho State Univ, Pocatello, ID 83209 USA

[18] Catholic Univ Amer, Washington, DC 20064 USA

[19] Florida State Univ, Tallahassee, FL 32306 USA

[20] Univ Roma Tor Vergata, I-00133 Rome, Italy

[21] Univ Iowa, Iowa City, IA 52242 USA

[22] Christopher Newport Univ, Newport News, VA 23606 USA

[23] Arizona State Univ, Tempe, AZ 85287 USA

[24] Inst Phys Nucl ORSAY, Orsay, France

[25] Skobeltsyn Inst Nucl Phys, Lomonosov, Russia

[26] Univ Richmond, Richmond, VA 23173 USA

[27] Coll William & Mary, Williamsburg, VA 23187 USA

[28] Univ Virginia, Charlottesville, VA 22901 USA

[29] Univ New Hampshire, Durham, NH 03824 USA

[30] George Washington Univ, Washington, DC 20052 USA

[31] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[32] Univ Connecticut, Storrs, CT 06269 USA

[33] Norfolk State Univ, Norfolk, VA 23504 USA

[34] Kyungpook Natl Univ, Taegu 702701, South Korea

[35] Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy

[36] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[37] Moscow MV Lomonosov State Univ, Moscow 119234, Russia

[38] James Madison Univ, Harrisonburg, VA 22807 USA

[39] Univ Ferrara, I-44122 Ferrara, Italy

[40] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[41] Calif State Univ Dominguez Hills, Carson, CA 90747 USA

[42] Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland

[43] Rensselaer Polytech Inst, Troy, NY 12180 USA

[44] Univ Genoa, I-16146 Genoa, Italy

[45] Univ Grenoble 1, Lab Phys Subatom & Cosmol, CNRS, IN2P3,Inst Natl Polytech, Grenoble, France

[46] Canisius Coll, Buffalo, NY 14208 USA

来源：

SCIENCE | 2014年 / 346卷 / 6209期

基金：

英国科学技术设施理事会; 美国国家科学基金会; 新加坡国家研究基金会; 以色列科学基金会;

关键词：

NUCLEAR; SCATTERING;

D O I：

10.1126/science.1256785

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The atomic nucleus is composed of two different kinds of fermions: protons and neutrons. If the protons and neutrons did not interact, the Pauli exclusion principle would force the majority of fermions (usually neutrons) to have a higher average momentum. Our high-energy electron-scattering measurements using C-12, Al-27, Fe-56, and Pb-208 targets show that even in heavy, neutron-rich nuclei, short-range interactions between the fermions form correlated high-momentum neutron-proton pairs. Thus, in neutron-rich nuclei, protons have a greater probability than neutrons to have momentum greater than the Fermi momentum. This finding has implications ranging from nuclear few-body systems to neutron stars and may also be observable experimentally in two-spin-state, ultracold atomic gas systems.

引用

页码：614 / 617

页数：4

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