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The structure of giant resonances in calcium and titanium isotopes. N.G.Goncharova, Iu.A.Skorodumina Skobelzyn Institute of Nuclear Physics, Moscow State.

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Presentation on theme: "The structure of giant resonances in calcium and titanium isotopes. N.G.Goncharova, Iu.A.Skorodumina Skobelzyn Institute of Nuclear Physics, Moscow State."— Presentation transcript:

1 The structure of giant resonances in calcium and titanium isotopes. N.G.Goncharova, Iu.A.Skorodumina Skobelzyn Institute of Nuclear Physics, Moscow State University

2 Origins of multipole resonances fragmentation? E1 in Titanium Isotopes

3 Particle Core Coupling Shell Model (PCC SM )

4 Matrix elements of Hamiltonian

5 P.Plauger, E.Kashy, Nucl.Phys.A152(1970)609

6 Number of basic configurations

7 E1 form factors

8 46 Ti Isospin factors in excitation and decay

9 48 Ti Isospin factors in excitation and decay

10 50 Ti Isospin factors in excitation and decay

11 E1 form factors at photopoint in 46 Ti

12 R.E.Pywell, M.N.Thompson ea,Nucl.Phys. A 318 ( 1979)461

13 E1 form factors at photopoint in 48 Ti

14 R.Sutton, M.N.Thompson et al, Nucl.Phys. A 339( 1980)125 48 Ti(γ,n)

15 E1 form factors in 50 Ti

16 50 Ti(γ,n) R.E.Pywell, M.N.Thompson R.A.Hicks, Nucl.Phys. A325(1979).116

17 Spectroscopy of 40 Ca(d,t) at E p =52 MeV P. Doll, G.J. Wagner, K.T. Knopfle, Nucl.Phys. A263(1976) 210

18 E1 in 40 Ca A.Veyssiere et al., Nucl. Phys.A227(1972)513

19 M6 in Ca-40 q = 1.8 Fm -1

20 The maximal energies of projectiles in the pick-up reactions and occupation of 1d 5/2 subshell

21 Spectroscopy of 48 Ca

22 G.J O’Keefe., M.N Thompson. et al, Nucl.Phys. A469(1987)239

23 Mean weighted energies for T branches and isospin splitting Bull.RAS,Physics,75(2011)1540-1543 Bull.RAS,Physics,76(2012)1085-1088

24 SUMMARY 1.The calculations of the E1 strengths in calcium and titanium isotopes have shown that one of the main origins of resonances’ fragmentation is the energy spread of final nuclei states. This factor could be taken into account in PCCSM. 2.For the realistic description of the nuclei disintegration due to interactions with electromagnetic fields spectroscopic information on direct reactions should be obtained with energy of projectiles at least on 15 MeV higher than the maximum energy of the photon.

25 The structure of pigmy resonances = a problem T. Hartmann et al, Phys. Rev. Lett.,.85 (2000) 274

26 Behavior of form factors


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