Towards(the(first(observa/on(of(( - - PowerPoint PPT Presentation

Towards(the(first(observa/on(of(( isoscalar(giant(monopole(resonances(( in(unstable(/n(isotopes( with(CNS(Ac/ve(Target((CAT) Shinsuke)OTA) (

the(University(of(Tokyo(

Sep.(14E18,(2015 COMEX5,(Krakow

• Supported(by(KAKENHI(Grant(Number(15H00834(

Nucleon(systems

1 A

• proton(

neutron( atomic(nuclei( =(protons(+(neutrons neutron(star( ~(neutrons( 1fm( 1.4g/cm3((Sun)( several(fm( ~1014g/cm3 10km( >1014g/cm3

Sep.(14E18,(2015 COMEX5,(Krakow

• These(many(body(systems((are(

with(different(size(with(two( components,(which(is(governed( by(Equa/on(of(State(of(nuclear( ma\er( Determina2on)of)EoS)for)symmetric)and)asymmetric)ma9er

Key(words

• Isoscalar(giant(monopole(resonance(

– cf.(Keynote(talks(in(this(conferences(and(others(

• Kτ((isospin(dependence(of(incompressibility(at(

satura/on(density(of(asymmetric(ma\er)(

– can(be(directly(extracted(via(experiments( – experiment(plan(of(132Sn(d,d’)( – pilot(experiment(of(132Xe(d,d’)(

• CAT(Ac/ve(target(system((

– Newly(developed(for(high(luminosity(exp.(

• High(luminosity(

– (=(beam(intensity(x(target(thickness)(

Sep.(14E18,(2015 COMEX5,(Krakow

Kτ

Sep.(14E18,(2015 COMEX5,(Krakow

• E(ρ, α) = E(¯

x0, α) + 1

2[(1 + 3¯

x0)2E′′(¯ x0, α)]¯ x2 + · · · ≡ ε0(α) + 1

2K0(α)¯

x2 + · · · , (16)

ε0(α) = ε0 + ετα2 + O(α4) = ε0 + Jα2 + O(α4), K0(α) = K0 + Kτα2 + O(α4) = K0 +

• Ksym − 6L − Q0

K0 L

• α2 + O(α4).

KA ∼ Kvol(1 + cA−1/3) + Kτ[(N − Z)/A]2 + KCoulZ2A−4/3,

Measurement(of(KA(by(changing(asymmetry((NEZ)/A(~(isospin

0.1 0.12 0.14 0.16 0.18 0.2

(N-Z)/A

135 140 145 150 155 160

K - K Z A (MeV)

Sn Cd

A Coul 2

• 4/3

112-124 106,110-116

−

140 145 150 155

K - K Z A (MeV)

A Coul 2

• 4/3

Experimental(Value(of(Kτ

T.(Li(et(al.,(PRL99((2007)(162503

G.(Colo,(U.(Garg,(and(H.(Saga,(EPJA50((2014)(26 Sep.(14E18,(2015 COMEX5,(Krakow

• KA ∼ Kvol(1 + cA−1/3) + Kτ[(N − Z)/A]2 + KCoulZ2A−4/3,

Data:(( D.(Patel(et(al.(PLB718((2012)(447( T.(Lie(et(al.,(PRC81((2010)(034309

ignore(the(slight(change(of(AE1/3( filng(a(+(b((NEZ)2/A2(:(b(=(Kτ( Kτ((=(500(MeV(+E(100(MeV Kτ(~(500E550(MeV(+E100MeV (α,α’)(measurement(at(RCNP

Ktau(project

124Sn( (0.194)2( =0.038 112Sn( (0.107)2( =0.011 116Cd( (0.172)

Sep.(14E18,(2015 COMEX5,(Krakow

• 106Cd(

(0.094)

KA ∼ Kvol(1 + cA−1/3) + Kτ[(N − Z)/A]2 + KCoulZ2A−4/3,

not(official

Ktau(Project

132Sn( (0.242

Isotope Isotone

Sep.(14E18,(2015 COMEX5,(Krakow

• 132Sn@RIBF(

Approved( Doubly(magic(

132Sn( (0.242)2( =0.059 106Sn( (0.056)2( =0.003

KA ∼ Kvol(1 + cA−1/3) + Kτ[(N − Z)/A]2 + KCoulZ2A−4/3,

Isotope:(many(stable(nuclei(are(available(( =>(extend(to(the(unstable(nuclei(region( and(other(chains Sn(isotopes cf.(Ni(isotope(chain(:(M.(Vandebrouck(et(al.

Ktau(Project

132Sn( (0.242 132Xe( (0.212)

Isotope Isobar

Sep.(14E18,(2015 COMEX5,(Krakow

• 132Sn@RIBF(

Approved( Doubly(magic(

132Sn( (0.242)2( =0.059

@HIMAC( 2014

106Sn( (0.056)2( =0.003

KA ∼ Kvol(1 + cA−1/3) + Kτ[(N − Z)/A]2 + KCoulZ2A−4/3,

132Nd( (0.09)2( =0.008

Isotope:(many(stable(nuclei(are(available(( =>(extend(to(the(unstable(nuclei(region( and(other(chains Isobar:(li\le(dependence(on(A(=>(new( challenge((how(about(deforma/on?) Isobar

PLAN:) ISGMR)IN)132SN)VIA)(D,D’)

Sep.(14E18,(2015 COMEX5,(Krakow

CNS(Ac/ve(Target((CAT)

• TPC(and(Si)array)

– 0.4(atm.(pure( deuterium(gas( – Gas(Electron( Mul/plier((GEM)(:( required(gain(~(104( – 300(um(resolu/on( achieved(

• Sep.(14E18,(2015

COMEX5,(Krakow

• E~1kV/cm/atm

25cm 10cm)x)10cm 9cm)x)9cm,)0.5mmt

• 5

10 15 20 25 30 1 2 3 4 5 6 7 8 9 10 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45

(a)

>(100(kcps(beam(injec/on( Thickness(=(0.1(mg/cm2(

(

⇒ high(luminosity( ⇒ (p,p’),((d,d’),((a,a’) Convers(2(deg(and( >(4(deg.(at(14(MeV( by(TPC Ex((MeV) ThetaCM((deg) 30 Tracking(is(done(by(filng( the(energy(deposit(and(dris( /me

RIBF113(experiment(132Sn(d,d’)( at(RIBF((in(near(future)

TOFEBρEBρ ! Diamond) (0.2)mm)) ! MWDC) ! Plas/c( ! MWDCs( ! Degrader( ! Diamond( ! MWDCs( 132Sn( 100(MeV/u( >100kcps( (total(~(1Mcps)(

Sep.(14E18,(2015 COMEX5,(Krakow

132Sn( 100(MeV/u( >100kcps( (total(>300kcps)( ac/ve( target luminosity(=(105(cps(x(1020cmE2(((~(0.01(mbE1sE1(

Yield(and(Error(Es/ma/on

Sep.(14E18,(2015 COMEX5,(Krakow

• Excitation Energy (MeV)

5 10 15 20 25 30

Strength (a.u.)

1000 2000 3000 4000 5000 6000

10(days(w/(100kcps)132Sn)beam)(>300kcps) in)total)) δEx(=(1(MeV(,δθCM(=(0.5(deg( Total(cross(sec/on(is(calculated(using(OM.( Only(monopole(/(spherical(Bessel( ⇒ dEGMR(~(0.17(MeV( Expected(strength(distribu/on

(N-Z)/A 0.05 0.1 0.15 0.2 0.25 0.3 (MeV)

• 4/3

A

2

Z

Coul

• K

A

K 110 120 130 140 150 160 170

Ex = 13.84 Ex = 14.34 Ex = 14.84

⇒ error(of(Kτ(can(be(reduced(to(50( MeV(from(70(MeV.( ⇒ 0.5(MeV(difference(in(EGMR( corresponds(to(80(MeV(difference( in(Kτ Extrac/on(of(Kτ Very(simple( simula/on

OPERATION)WITH)HIGH)RATE)BEAM) AND)132XE(D,D’)

Sep.(14E18,(2015 COMEX5,(Krakow

Opera/on(with(highEintensity(beams

Sep.(14E18,(2015 COMEX5,(Krakow

• Segmented)THGEM)provides(be\er(energy(

resolu/on(than(mesh(grid(along(the(beam(path.( =>(stable(with(up(to(the(500Ekcps(100EMeV/u( 132Xe(beam( large(energy(deposit(by(beam(caused( discharge(of(THGEM( because(of(too(much(gain(for(beam(region( =>(reduc/on(of(effec/ve(gain ~1mA( w/(beam(intensity(of(106(cps( =>(O(1)(mA(at(last(THGEM. segmented(THGEM mesh(grid gain(>2000 gain(>2000 gain(<(100

132Xe(d,d’)(at(HIMAC

• HIMAC((22th(–(25th(Jan,(2015)(

– 132Xe((

• 100MeV/u(
• 500)kcps))

– 106(ppp(with(2Esec( extrac/on(

– 3(GEMs(with(0.4E atm(deuterium(

Sep.(14E18,(2015 COMEX5,(Krakow

• As(a(study(of(nuclear(incompressibility(in(isobars(

and(test(for(the(highEintensity(beam(injec/on Synchrotron((at(Chiba(prefecture(in(Japan(( Mainly(used(for(radiotherapy

132Xe(d,d’)(at(HIMAC

• HIMAC((22th(–(25th(Jan,(2015)(

– 132Xe((

• 100MeV/u(
• 500)kcps))

– 106(ppp(with(2Esec( extrac/on(

– Huge(number(of( delta(rays(

Sep.(14E18,(2015 COMEX5,(Krakow

• Hit(pa\ern(for(one(event
• d2N

dTdx = 1 2 Kz2 Z A 1 β2 F(T) T 2 Tmax = 2mec2 β2γ2 1 + 2γme/M + (me/M)2

deltaEray(energy(distribu/on

• le. The factor F is spin-dep

es F(T) = (1 − β2T/Tmax); incident electrons, the indi

132Xe(d,d’)(at(HIMAC

Sep.(14E18,(2015 COMEX5,(Krakow

• Hit(pa\ern(for(one(event

Cut(by(pulse(height((or(charge)

132Xe(d,d’)(at(HIMAC

Sep.(14E18,(2015 COMEX5,(Krakow

• Cut(by(pulse(height((or(charge)

δE=3.9(MeV( FWHM w/(tracking(using(charge(and(dris(/me( taking(the(effect(of(diffusion(into(account( w/o(correc/on(of(efficiency( E(less(than(1/10(of(total(data( E(need(to(check(the(uniformity(and( stability(of(gain Tracking(and(accumulate(events

Summary(and(outlook

• CNS(Ac/ve(Target((CAT)(is(developed(for(the(measurement(of(

deuteron((or(alpha)(inelas/c(sca\ering.(

– Worked(with(the)high)intensity)beams)up)to)500)kcps.( – Achievable(luminosity(is(0.01(mbE1sE1(

• Measurement(of(132Xe(d,d’)((and(14O)(was(performed(at(HIMAC.(

– Elas/c(peak(is(observed.(The(excita/on(energy(resolu/on(is(3.8)MeV) FWHM)(preliminary).(

• ISGMR(in(132Sn(will(be(studied(via((d,d’)(reac/on(using(CAT(in(near(

future.(

– Systema/c(measurement(of(ISGMR(can(be(performed(at(RIBF.(

• 132Sn,(106Sn,(A=132(isobar(etc.(

Sep.(14E18,(2015 COMEX5,(Krakow

Collaborators

• CAT(development(

– S.)Ota,)H.)Tokieda,)C.S.) Lee,)Y.N.)Watanabe,(R.( Kojima,(Y.(Aramaki,(S.( Michimasa,(H.(Matsubara,( M.(Dozono,(M.(Takaki,Y.( Kiyokawa,((CNS)((J.( Zenihiro((RIKEN)((

• with(help(by(

– H.(Yamaguchi,(K.(Yako( (CNS)((H.(Otsu,(T.(Uesaka( (RIKEN)(( – E.(Takada((NIRS)

• H307((140)(

– CAT(developper((les)( – Y.(Kubota,(T.(Nakao,(T.( Nichi,(Y.(Tanaka,(K.(Okochi,( A.(Obertelli,(A.(Corsi,(C.( Santamaria,(J.(Gibelin,(Y.( Matsuda,(Y.(Maeda(

• H307((132Xe)(

– CAT(developperY.(Maeda,( S.(Gotanda,(xxx,(U.(Garg,(Y.( Guputa,(T.(Peach(

• RIBF113((132Sn)(to(be(

done(

– S.(Ota,(U.(Garg(et(al.(

Sep.(14E18,(2015 COMEX5,(Krakow