Update from ISOLDE Physics Karl Johnston Summary from

Update from ISOLDE Physics Karl Johnston Summary from HIE-ISOLDE workshop Planned experiments this year Beams and targets Schedule for this year Possibility of stable running after protons

HIE-ISOLDE Experiments Workshop 1. 2. 2016 Norbert PIETRALLA IS 546 - Study of the effect of shell stabilization of the collective isovector valence-shell excitations along the N=80 isotonic chain Norbert PIETRALLA IS 596 - 2 + Anomaly and Configurational Isospin Polarization of 136 Te Thorsten KROELL IS 548 - Evolution of quadrupole and octupole collectivity north-east of 132 Sn: the even Te and Xe isotopes Thorsten KROELL IS 549 - Coulomb Excitation of Neutron-rich 134; 136 Sn isotopes Peter REITER IS 551 - Coulomb excitation of doubly magic 132 Sn with MINIBALL at HIE-ISOLDE Peter BUTLER IS 553 - Determination of the B(E 3, 0+->3 -) strength in the octupole correlated nuclei 142, 144 Ba using Coulomb excitation Magdalena ZIELINSKA IS 557 - Coulomb excitation 74 Zn-80 Zn (N=50): probing the validity of shell-model descriptions around 78 Ni Dave JENKINS IS 569 - Solving the shape conundrum in 70 Se Silvia LEONI et al. IS 595 - Spectroscopy of particle-phonon coupled states in 133 Sb by the cluster transfer reaction of 132 Sn on 7 Li: an advanced test of nuclear interactions Zsolt PODOLYAK IS 547 - Coulomb excitation of the two proton-hole nucleus 206 Hg Daniel Thomas DOHERTY IS 597 - Probing Shape Coexistence in neutron-deficient 72 Se via Low-Energy Coulomb Excitation Tuomas GRAHN IS 506 - Mapping the boundaries of the seniority regime and collective motion: Coulomb excitation studies of N = 122 isotones 206 Po and 208 Rn Tuomas GRAHN IS 516 - Coulomb excitation of 116 Te and 118 Te: a study of collectivity above the Z = 50 shell gap

HIE-ISOLDE Experiments Workshop 1. 2. 2016 Sunniva SIEM IS 559 - Statistical properties of warm nuclei: Investigating the low-energy enhancement in the gamma strength function of neutron-rich nuclei B. S. NARA SINGH IS 478 - Shape determination in Coulomb excitation of 72 Kr Katarzyna WRZOSEK-LIPSKA IS 563 - Coulomb excitation of 182 -184 Hg: Shape coexistence in the neutron-deficient lead region Janne PAKARINEN IS 566 - Probing intruder configurations in 186, 188 Pb using Coulomb excitation Peter BUTLER IS 552 - Measurements of octupole collectivity in Rn and Ra nuclei using Coulomb excitation Dhruba GUPTA IS 554 - Search for higher excited states of 8 Be* to study the cosmological 7 Li problem Riccardo Raabe IS 556 - Spectroscopy of low-lying single-particle states in 81 Zn populated in the 80 Zn(d, p) reaction Joakim CEDERKALL IS 562 - Transfer Reactions and Multiple Coulomb Excitation in the 100 Sn Region Giacomo DE ANGELIS IS 572 - Study of shell evolution around the doubly magic 208 Pb via a multinucleon transfer reaction with an unstable beam Adrien MATTA IS 591 - 18 N: a challenge to the shell model and a part of the flow path to r-process element production in Type II supernovae Riccardo RAABE IS 587 - Characterising excited states in and around the semi-magic nucleusn 68 Ni using Coulomb excitation and one-neutron transfer

HIE-ISOLDE Experiments Workshop 1. 2. 2016 First conclusions - 24 approved proposals ask for beam time in 2016 Full energy range of accelerator up to 6. 0 Me. V/u Mass range from 18 N up to 228 Ra MINIBALL configuration for Coulomb excitation and transfer reactions will be installed for 2016 campaign - Combination with SPEDE is available after successful stable beam commissioning in summer 2016 - High number of experiments should be provided to user community - Everyone is eagerly awaiting the HIE-ISOLDE beams

HIE-ISOLDE Experiments Workshop 1. 2. 2016 Reality. . . - 24 approved proposals ask for beam time in 2016 won‘t be able to serve more than 7 Full energy range of accelerator up to 6. 0 Me. V/u 5. 5 Me. V/u Mass range from 18 N up to 228 Ra intermediate masses MINIBALL configuration for Coulomb excitation and transfer reactions will be installed for 2016 campaign going to go with C-REX Combination with SPEDE is available after successful stable beam commissioning in summer 2016 tests continuing High number of experiments should be provided to user community 7 possible Everyone is eagerly awaiting the HIE-ISOLDE beams no argument there. . . Beams 2016: 108 Sn, 80 Zn, 142 Xe, 132 Sn, 9 Li , 59 Cu(? ), 66 Ni? 70 Se? 4 -4. 5, 4 -4. 3, 4. 5, 5. 5, 7, 5. 5,

IS 562 La. C unit…strong beams RILIS ionised

IS 557 Demanding target unit…quartz line (but made)

IS 548: Evolution of quadrupole and octupole collectivity northeast of 132 Sn: the even Xe Spokespersons: Th. Kröll / G. S. Simpson • Neutron-rich Xe isotopes: - regular behaviour at low spin/excitation energy (IS 411) - onset of octupole collectivity (nf 7/2 « ni 13/2) N=88 Octupole ”magic” numbers Z=56 Ba 142 Xe Z=54 Xe Z=52 Te Z=50 Sn 132 Sn 1 st February 2016 | HIE-ISOLDE Workshop | Experiment IS 548 | Thorsten Kröll | 9 ita n g co ing n i ra cern opy r e t con sc … ectro sp

IS 548: Evolution of quadrupole and octupole collectivity north-east of 132 Sn: the even Xe • safe Coulex (4. 5 Me. V/u) on 206 Pb C-REX Backward barrel MINIBALL + C-REX • Large angular range (CMS): 25°-170° èdifferent sensitivities on single/multiple excitation and reorientation E 2/E 3 excitation: different ang. dist. Statistical error / angular bin: < 10% Forward CD • First isotope 142 Xe; yield with NC (has been used by IS 411) 142 Xe T 1/2[ s] Yield [/m. C] Int [/s] 1. 25 3. 7· 107 106 Analysis by Ph. D student of Shawn Bishop (TU München) We request 30 shifts (10 days) of beam time Strong beam…no RILIS… 1 st February 2016 | HIE-ISOLDE Workshop | Experiment IS 548 | Thorsten Kröll | 10

IS 551: Coulomb excitation of doubly magic with MINIBALL at HIE-ISOLDE 132 Sn ISOLDE beam intensities Element A number Half life SC or PSB* Yield at ISOLDE Target material (ions/µC) Sn 123 - g 129. 2 d SC 5. 0 E+08 UCx Sn 125 - g 9. 64 d SC 1. 3 E+08 UCx Sn 127 - g 2. 10 h SC 6. 0 E+07 UCx Sn 129 - g 2. 23 m SC 5. 0 E+07 UCx Sn 131 - m 58. 4 s SC 1. 5 E+07 UCx Sn 132 - g 39. 7 s SC 3. 0 E+07 UCx accelerator efficiency of the complete HIE-ISOLDE chain for 132 Sn beam 2% beam intensity at MINIBALL of I(132 Sn)= 8. 5 x 105 ions/s PSB proton beam current 1. 4 µA HIE-ISOLDE beam energy: 5. 5 Me. V/u U. Köster et al. Nucl. Instr. and Meth. B 266 (2008) 4229 ‘safe’ Coulex 132 Sn (@ 5. 5 Me. V/u) + 206 Pb Target projectile distance at q. Lab= 77° d= 39. 6 fm ‘safe’ criterion d > Rp + Rt + 5 fm = 18. 8 fm

IS 551 Coulomb excitation of the first 2+ and 3 - states of the doubly magic nucleus 132 Sn. B(E 2) and B(E 3) values in 132 Sn will provide information on cross shell configurations which are expected to be dominated by a strong proton contribution. Test of theoretical predictions: i) large scale shell model calculations ii) mean field calculations (RPA and QRPA) Main advantages of the HIE-ISOLDE-MINIBALL experiment i) intense 132 Sn beam at ISOLDE ii) high beam energy of HIE-ISOLDE however high beam energy is mandatory iii) high energy resolution and good efficiency MINIBALL HPGe detectors Beam time request: 15 x 8 hours shifts for 132 Sn high energy g-ray calibration, HIE-ISOLDE set-up 3 x 8 hours shifts 18 shifts are approved for this proposal

Transfer reactions at the neutron dripline with triton target – IS 561 Set-up, XT 02 9 Li(t, p)11 Li, Main physics aims SAND: 30 (2 x 12+6) n-detectors 2 o angular resolution, @ 3 m distance to target • (Re)check 11 Li halo composition / 2 n-spectroscopic factor • Resonance(s) present just above threshold in 11 Li ? Possible contaminants: (9 Be, ) 12 C, 18 O • If decay neutrons – consistent with isotropic emission ? • Charge state 9 Li 3+: stripping reduces C/O by 5× 10 -5/6× 10 -4, • Will also look for other reaction channels: • Charge state 9 Li 2+: only O, stripping reduction 5× 10 -3, 5. 5 Me. V/u • 9 Li(t, alpha)8 He, • 9 Li(t, t)9 Li* • 9 Li(t, d)10 Li done for 7 Li(t, alpha)6 He unbound states 7 Me. V/u • Expected 9 Li intensity on secondary target 106 /s • Proton count rate: 60/shift to g. s. , 30/shift to low-lying resonances • • 20 shifts (+ background measurement) will give decent angular distribution for g. s. This data will allow to exclude or prove presence of low-lying structures • Neutron efficiency 3% in compact geometry • Cannot run in August

IS 559 Ucx target: 66 Ni strong beam Problems this year with Ni (but more exotic)

IS 569

IS 569 From 2016: mixed experience with 70 Se beams this year…. (Ge was produced instead) Zr. O 2 target Efficiency at miniball? Reserve list

IS 607

Some doubts about quality of vacuum…. . 1 e-5 RESERVE

Going to change further…. . probably some experiments have to This is being changed…with a view to publishing this week…. possibility of stable beam after protons? be cut…. or reduced shifts…more on HRS…

HELIOS (ISS) Initial setup in B 190. Searching LHe for cool-down 2 Proposals at Wednesday’s INTC

MINIBALL experiments at HIE-ISOLDE # of approved experiments total: 43 exp. Status January 2015 # of approved shifts total: 731 shifts