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Quest for chirality in 107 Ag

第十三届全国核结构研讨会 赤峰 2010.7.25-31. Quest for chirality in 107 Ag. He Chuangye. outline. Introduction. Experiment and results. Discussion. conclusion. Introduction. 134 Pr, 2006, D. Tonev Lifetime measurement Not typical chiral bands. Cs, La, Pr, Pm, Eu. Odd-odd nuclei

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Quest for chirality in 107 Ag

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  1. 第十三届全国核结构研讨会 赤峰 2010.7.25-31 Quest for chirality in 107Ag He Chuangye

  2. outline Introduction Experiment and results Discussion conclusion

  3. Introduction 134Pr, 2006, D. Tonev Lifetime measurement Not typical chiral bands Cs, La, Pr, Pm, Eu. Odd-odd nuclei More than 20 expmplesin A~130 mass region

  4. Introduction 2006Y, 106Ag11B+100Mo CIAE A~110 mass region Odd-odd Tc,Rh,Ag 6 examples pgg/2nh11/2 Hole state: pg9/2 Joshi P et al., PRL, 2007, 98: 102501 Not good chiral bands 107Ag Intreasting case Good candidate of chirality?

  5. Previous experimental results of 107Ag Dan Jerrestam et al., 94Zr(17O,1p3n)107Ag, Nucl.Phys.A 577 (1994) 786-812 @ 80 MeV Company Logo

  6. Experiment details of 107Ag • 100Mo(11B,4n)107Ag • CIAE, HI-13 • Tandem accelerator • 100Mo→1.57mg/cm2， • Au →8.03mg/cm2 Beam energy :60 MeV

  7. Gamma Detection Array in CIAE: 10 HPGe-BGOs, 2 planar and 1 Clover detector Company Logo

  8. Experimental results---Total Projection • 2×108- events • E-E and DCO ratio matrix 865 Total projection 107Ag 1062 1095 1307 Gate by 312keV 312 Company Logo

  9. Experimental results ---Intensity and DCO ratio Total efficency Efficency at 37° Efficency at 90°

  10. New level scheme of 107Ag

  11. Discussion PHYSICAL REVIEW C 76, 024307 (2007) 105Ag 107Ag Company Logo

  12. Discussion--- woods saxon nilsson diagram proton neutron Company Logo

  13. Discussion 105Ag TAC: ε2~0.19 γ~24° A. Y. Deo et al., Phys.Rev.C 73, 034313 (2006) 105Rh TRS J. A. Alcántara-Núñez et al., Phys.Rev.C 69, 024317 (2004)

  14. Discussion 104Rh: PRL.92(2004),032501 • Near degeneracy level energy • S(I) smooth changing with • spin； • staggering in the B(M1)/B(E2) • ratios • Identical or similar • Alignment • Moment of inertia

  15. Discussion

  16. Discussion Near degneracy level energy S(I) smooth changing with I Band 3 and band 4 in 107Ag are suggested as chiral bands Staggering in B(M1)/B(E2) Similar aligned angular momenta Close in moment of inertia

  17. Conclusion • A new level scheme of 107Ag are established • Band 3 and band 4 are suggested as chiral bands

  18. Thank You ! Happy New Year!

  19. PHYSICAL REVIEW C 76, 024307 (2007) 105Ag • PHYSICAL REVIEW C 76, 024307 (2007)

  20. +1 -1 I+4 -1 +1 I+3 -1 +1 I+2 +1 -1 I+1 +1 -1 I • T. Koike, K. Starosta, and I. Hamamoto, • Phys. Rev. Lett. 93, 172502 (2004) Company Logo

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