Radio Frequency Fragment Separator at NSCL

Bazin, D.; Andreev, V.; Becerril, A.; Doléans, M.; Mantica, P. F.; Ottarson, J.; Schatz, H.; Stoker, J.; Vincent, J.

doi:10.1016/j.nima.2009.05.100

Cited by 47 publications

(41 citation statements)

References 16 publications

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“…The 26 P ions were in-flight separated from other fragmentation products according to their magnetic rigidity by the A1900 fragment separator [39]. The Radio-Frequency Fragment Separator (RFFS) [40] provided a further increase in beam purity before the beam was implanted into a 9 cm diameter, 1 cm thickness planar germanium double-sided strip detector (GeDSSD) [41]. In order to detect signals produced by both the implanted ions and the β particles emitted during the decay, the GeDSSD was connected to two parallel amplification chains.…”

Section: Methodsmentioning

confidence: 99%

β-delayedγdecay ofP26: Possible evidence of a proton halo

Pérez–Loureiro¹,

Wrede²,

Bennett³

et al. 2016

Phys. Rev. C

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Background: Measurements of β decay provide important nuclear structure information that can be used to probe isospin asymmetries and inform nuclear astrophysics studies.Purpose: To measure the β-delayed γ decay of 26 P and compare the results with previous experimental results and shell model calculations. Method:A 26 P fast beam produced using nuclear fragmentation was implanted into a planar germanium detector. Its β-delayed γ-ray emission was measured with an array of 16 high-purity germanium detectors. Positrons emitted in the decay were detected in coincidence to reduce the background. Results:The absolute intensities of 26 P β-delayed γ-rays were determined. A total of six new β-decay branches and 15 new γ-ray lines have been observed for the first time in 26 P β-decay. A complete β-decay scheme was built for the allowed transitions to bound excited states of 26 Si. f t values and Gamow-Teller strengths were also determined for these transitions and compared with shell model calculations and the mirror β-decay of 26 Na, revealing significant mirror asymmetries. Conclusions:A very good agreement with theoretical predictions based on the USDB shell model is observed. The significant mirror asymmetry observed for the transition to the first excited state (δ = 51(10)%) may be evidence for a proton halo in 26 P.

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Section: Methodsmentioning

confidence: 99%

β-delayedγdecay ofP26: Possible evidence of a proton halo

Pérez–Loureiro¹,

Wrede²,

Bennett³

et al. 2016

Phys. Rev. C

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“…9000 pps), pure (95%) beam of fast 31 Cl ions was produced at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University using fragmentation of a 150-MeV/u, 75-pnA 36 Ar primary beam from the Coupled Cyclotron Facility incident upon a 1627-mg/cm 2 Be transmission target. Beam purification was accomplished both by magnetic rigidity separation using the A1900 fragment separator [32] and a 145 mg/cm 2 Al wedge, and by time-of-flight separation using the Radio Frequency Fragment Separator (RFFS) [33]. Two 300 µm-thick Si detectors approximately one meter upstream of the ex- perimental setup were lowered periodically into the beam for particle identification purposes.…”

Section: The Thermonuclearmentioning

confidence: 99%

Isospin Mixing RevealsP30(p,γ)S<

et al. 2016

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“…The resulting fragments have similar Bρ values and cannot be separated by the A1900, therefore additional separation by velocity is needed. The NSCL Radio Frequency Fragment Separator (RFFS) [22] was employed to provide a sinusoidal electric field to deflect ions depending on their phase relationship with the cyclotron frequency. This phase relationship at the downstream location of the RFFS depends on the particle velocity.…”

Section: Experimental Techniquementioning

confidence: 99%

β-delayed proton emission in the100Sn region

Lorusso¹,

Becerril²,

Amthor³

et al. 2012

Phys. Rev. C

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β-delayed proton emission from nuclides in the neighborhood of 100 Sn was studied at the National Superconducting Cyclotron Laboratory. The nuclei were produced by fragmentation of a 120 MeV/nucleon 112 Sn primary beam on a Be target. Beam purification was provided by the A1900 Fragment Separator and the Radio Frequency Fragment Separator. The fragments of interest were identified and their decay was studied with the NSCL Beta Counting System (BCS) in conjunction with the Segmented Germanium Array (SeGA +1.9 −1.7 %, 1.3(5)%, 1.9(1)%, 7.5(5)% and 2.5(3)%, respectively. The b βp = 22(1)% for 101 Sn was deduced with higher precision than previously reported. The impact of the newly measured b βp values on the composition of the type-I X-ray burst ashes was studied.

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Radio Frequency Fragment Separator at NSCL

Cited by 47 publications

References 16 publications

β-delayedγdecay ofP26: Possible evidence of a proton halo

β-delayedγdecay ofP26: Possible evidence of a proton halo

Isospin Mixing RevealsP30(p,γ)S<

β-delayed proton emission in the100Sn region

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