The Stern–Gerlach polarized ion source for the Munich MP-tandem laboratory, a bright source for unpolarized hydrogen and helium ion beams as well

Hertenberger, R.; Metz, A.; Eisermann, Y.; Abiary, K. El; Ludewig, Anna-Dorothea; Pertl, Cordula; Trieb, S.; Wirth, H.-F.; Schiemenz, P.; Graw, G.

doi:10.1016/j.nima.2004.08.083

Cited by 31 publications

(18 citation statements)

References 10 publications

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“…The bright Stern-Gerlach polarized ion source was used with unpolarized hydrogen [17,20]. The lead target (see caption of Table II) was wobbled with a frequency of 2 sec to avoid damage at beam intensities of about 1µA.…”

Section: A 208 Pb( P P ) Experiments With the Q3d Facilitymentioning

confidence: 99%

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Thei11/2f5/2andi11/2
Heusler
¹
,
Graw
²
,
Hertenberger
³

et al. 2006
Phys. Rev. C
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Inelastic proton scattering via isobaric analog resonances allows derivation of rather complete information about neutron particle-hole states. We applied this method to the doubly-magic nucleus 208 Pb by measuring angular distributions of the reaction 208 Pb(p, p ) on top of the isobaric analog resonances in 209 Bi with the Q3D magnetic spectrograph at München. We identify the six states of the i 11/2 f 5/2 multiplet and the four states of the i 11/2 p 3/2 multiplet in the energy range 4.6 MeV < E x < 5.3 MeV. Firm spin assignments for the 10 states are given, most of them new. Additional measurements of the reaction 207 Pb(d, p) confirm the assignments. A new state at E x = 5239 keV has a dominant proton particle-hole structure with spin 4 − .

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Section: A 208 Pb( P P ) Experiments With the Q3d Facilitymentioning

confidence: 99%

“…The present status of the Q3D facility at München [17][18][19][20] allows measurement of 208 Pb(p, p ) spectra with a resolution of about 3 keV on all known IAR in 209 Bi and up to excitation energies of at least 8 MeV. The IAR-pp data are complemented by 207 Pb(d, p) measurements.…”

Section: Introductionmentioning

confidence: 99%

Thei11/2f5/2andi11/2
Heusler
¹
,
Graw
²
,
Hertenberger
³

et al. 2006
Phys. Rev. C
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4
43
1
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“…The Stern-Gerlach source [37] with electron-cyclotron resonance (ECR) ionizer and Cesium vapour target for charge exchange was able to produce proton beams with intensity up to 1.5 µA on the target. In our experiment the value of the polarization was 0.6.…”

Section: Experimental Procedures and Resultsmentioning

confidence: 99%

Sn120homologous levels via the123Sb(

et al. 2005

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The 123 Sb( p, α) 120 Sn reaction has been studied in a high resolution measurement at incident energy of 24 MeV using a polarized proton source and a Q3D spectrometer. The differential cross sections and asymmetries for transitions to levels of 120 Sn homologous to the lowest energy states of 119 In have been measured and interpreted in terms of the experimental differential cross sections and asymmetries of the parent 119 In states, on the basis of the weak-coupling model. Several (17) states of the 120 Sn residual nucleus, not previously reported in the literature, have been detected and spins and parities have been proposed for seven of them, while parities have been proposed for five other previously known levels. In order to analyze the transitions populating the homologous levels, for both differential cross sections and asymmetries, microscopic DWBA calculations have been performed using spectroscopic amplitudes obtained from a shell-model study.

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“…The MP tandem Van de Graaf was used to accelerate a 300-700 nA 2 H 1+ beam to an energy of 22 MeV [23]. 36 Ar targets were produced at the Center for Experimental Nuclear Physics and Astrophysics (CENPA) by implanting 3-6 µg/cm 2 of 36 Ar ions into 30 µg/cm 2 natural abundance carbon foils, as described in [24][25][26].…”

Section: Methodsmentioning

confidence: 99%

Discovery of34g,mCl(p,γ)35Arresonances activated at classical nova temperatures

et al. 2015

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Background: The thermonuclear 34g,m Cl(p, γ) 35 Ar reaction rates are unknown due to a lack of experimental nuclear physics data. Uncertainties in these rates translate to uncertainties in 34 S production in models of classical novae on oxygen-neon white dwarfs.34 S abundances have the potential to aid in the classification of presolar grains.Purpose: Determine resonance energies for the 34g,m Cl(p, γ) 35 Ar reactions within the region of astrophyical interest for classical novae to a precision of a few keV as an essential first step toward constraining their thermonuclear reaction rates. Method:35 Ar excited states were populated by the 36 Ar(d, t) 35 Ar reaction at E(d)=22 MeV and reaction products were momentum analyzed by a high resolution quadrupole-dipole-dipole-dipole (Q3D) magnetic spectrograph. Results: Seventeen new35 Ar levels have been detected at a statistically significant level in the region Ex ≈ 5.9-6.7 MeV (Er < 800 keV) and their excitation energies have been determined to typical uncertainties of 3 keV. The uncertainties for five previously known levels have also been reduced substantially. The measured level density was compared to those calculated using the WBMB Hamiltonian within the sd − pf model space. Conclusions:Most of the resonances in the region of astrophyical interest have likely been discovered and their energies have been determined, but the resonance strengths are still unknown, and experimentally constraining the 34g,m Cl(p, γ) 35 Ar reaction rates will require further experiments.

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The Stern–Gerlach polarized ion source for the Munich MP-tandem laboratory, a bright source for unpolarized hydrogen and helium ion beams as well

Cited by 31 publications

References 10 publications

Thei11/2f5/2andi11/2
Heusler
¹
,
Graw
²
,
Hertenberger
³

et al. 2006
Phys. Rev. C
Self Cite
23
4
43
1
View full text Add to dashboard Cite

Thei11/2f5/2andi11/2
Heusler
¹
,
Graw
²
,
Hertenberger
³

et al. 2006
Phys. Rev. C
Self Cite
23
4
43
1
View full text Add to dashboard Cite

Sn120homologous levels via the123Sb(

Discovery of34g,mCl(p,γ)35Arresonances activated at classical nova temperatures

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The Stern–Gerlach polarized ion source for the Munich MP-tandem laboratory, a bright source for unpolarized hydrogen and helium ion beams as well

Cited by 31 publications

References 10 publications

Thei11/2f5/2andi11/2Heusler1, Graw2, Hertenberger3 et al. 2006Phys. Rev. CSelf Cite234431View full textAdd to dashboardCite

Thei11/2f5/2andi11/2Heusler1, Graw2, Hertenberger3 et al. 2006Phys. Rev. CSelf Cite234431View full textAdd to dashboardCite

Sn120homologous levels via the123Sb(

Discovery of34g,mCl(p,γ)35Arresonances activated at classical nova temperatures

Contact Info

Product

Resources

About

Thei11/2f5/2andi11/2
Heusler
¹
,
Graw
²
,
Hertenberger
³

et al. 2006
Phys. Rev. C
Self Cite
23
4
43
1
View full text Add to dashboard Cite

Thei11/2f5/2andi11/2
Heusler
¹
,
Graw
²
,
Hertenberger
³

et al. 2006
Phys. Rev. C
Self Cite
23
4
43
1
View full text Add to dashboard Cite