NEAR-BARRIER NEUTRON TRANSFER IN REACTIONS WITH 3 HE

NEAR-BARRIER NEUTRON TRANSFER IN REACTIONS WITH 3 HE Naumenko M. A. 1 , Samarin V. V. 1 , Penionzhkevich Yu. E. 1, 2 , Skobelev N. K. 1 1 Flerov Laboratory of Nuclear Reactions, JINR, Dubna, Russia; 2 National Research Nuclear University “MEPh. I”, Moscow, Russia

Motivation • Descriptionofexperimentaldataonformationof 44, 46 Scinreaction 3 He + 45 Scandformationof 196, 198 Auinreaction 3 He+197 Au • Testthetransfermodelononeofthesimplestpossibleneutrontransfer processesinthecaseofbothmedium-mass( 45 Sc)andheavy(197 Au) targets • Establishthebasisforapplicationofthemodelinmorecomplicated casesincludingclustertransfer

Modelbasics • Classicalmotionofcores • Time-dependent. Schrödingerequationtodescribeneutrontransfer • Theinitialwavefunctionwasdeterminedfromtheshellmodelwith parametersprovidingreasonablevaluesofchargeradiiandneutron separationenergy 2 (1) ( 2 ) 1 2 ˆ ˆ( , ) ( , ). 2 LS LSi r t V r t t m hr r r h

Neutronlevelsof 45 Sc, 3, 4 Heand 46 Scobtainedwithintheshellmodel 5/21/23/

Timeevolutionofprobabilitydensityof 3 Heneutroninthecollisionwith 45 Sc Neutronispredominantlytransferredto 2 p 3/2 state

Probabilityandcrosssectionofneutrontransfermin( ) 2 ( , )tr b E E p b E bdb min( , ) exp ( ) ( , )p b E A E B E R b E 5/21/23/22 ( , )i k p b E a P b

Formationcrosssectionsof 198 Auand 196 Auinreaction 3 He+ 197 Au Experimentaldata (1) N. K. Skobelev et al. , Phys. Part. Nucl. Lett. 2014. V. 11. P. 114. (2) Y. Nagame et al. , Nucl. Phys. A. 1988. V. 486. P. 77. http: //nrv. jinr. ru • Fusion-evaporationcontributionisnegligible • Resultsdemonstratesatisfactoryagreementwithexperimentaldata Evaporationcode

Formationcrosssectionsof 46 Scand 44 Scinreaction 3 He+ 45 Sc Experimentaldatafrom • N. K. Skobelev et al. , Phys. Part. Nucl. Lett. 2013. V. 10. P. 410. • N. K. Skobelev et al. , Bull. Russ. Acad. Sci. Phys. 2013. V. 77. P. 795. Evaporationcodes • NRVhttp: //nrv. jinr. ru • PACE http: //lise. nscl. msu. edu/pace 4. html Fusion-evaporationcontributionisatleastcomparabletotransfercontribution

Formationcrosssectionsof 46 Scand 44 Scinreaction 3 He+ 45 Sc Experimentaldatafrom • N. K. Skobelev et al. , Phys. Part. Nucl. Lett. 2013. V. 10. P. 410. • N. K. Skobelev et al. , Bull. Russ. Acad. Sci. Phys. 2013. V. 77. P. 795. Evaporationcodes • NRVhttp: //nrv. jinr. ru • PACE http: //lise. nscl. msu. edu/pace 4. html Sumoftransferandfusion-evaporationcontributionsdemonstratessatisfactoryagreementwithexperimentaldata

Conclusions • Theresultsofthedevelopedmodelformicroscopiccalculationof transferprobabilitiesandtransfercrosssectionswithinthe time-dependent. Schrödingerequationmethoddemonstrateoverall satisfactoryagreementwithexperimentaldata • Themodelmayalsobeappliedforcalculationofclustertransferand thusprovideadditionalinformationonclusterstructureofnuclei

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