Energy Levels of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Na</mml:mi></mml:mrow><mml:mrow><mml:mn>21</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Mg</mml:mi></mml:mrow><mml:mrow><mml:mn>22</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>

Ajzenberg‐Selove, F.; Cranberg, Lawrence; Dietrich, Frank

doi:10.1103/physrev.124.1548

Cited by 24 publications

(39 citation statements)

References 11 publications

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“…2.) We can get more information about probable spins and parities of yet unassigned states by considering the mirror nucleus Na 21 . There is a quite recent summary of the available results by Ajzenberg el a/., 12 who investigated the reaction Ne 20 (J,^)Na 21 .…”

Section: Experimental Datamentioning

confidence: 97%

“…We find an interesting remark on the concept of a "core" in a paper by Lane. 1 He calculates the positive parity states of N 13 and C 13 bycoupling a 2s -Id particle to the "parent" configuration (lp) s of C 12 and antisymmetrizing the wave functions of the combined systems properly. He states that even though the 2s-\p and Id-\p interaction integrals are as large as the lp-lp interaction integral, the coupling of the extra particle does not seem to disturb the core appreciably, as is confirmed by his results.…”

Section: Introductionmentioning

confidence: 99%

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Low-Lying Positive Parity States ofNe21

Dreizler

1963

Phys. Rev.

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Section: Experimental Datamentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Low-Lying Positive Parity States ofNe21

Dreizler

1963

Phys. Rev.

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“…The new species 35,36 Mg, 38,39 Al, 40,41 Si, 43,44 P, 45,46,47 S, 46,47,48,49 Cl, and 49,50,51 Ar are clearly visible." 37 Mg 37 Mg was discovered by Sakurai et al in 1996 as reported in "Production and identification of new neutron-rich nuclei, 31 Ne and 37 Mg, in the reaction 80A MeV 50 Ti + 181 Ta" [46]. A 50 Ti beam was accelerated at the RIKEN Ring Cyclotron to 80 MeV/nucleon and fragmented on a tantalum target.…”

Section: 30 Mgmentioning

confidence: 99%

“…In the 2002 article "New neutron-rich isotopes, 34 Ne, 37 Na and 43 Si, produced by fragmentation of a 64A MeV MeV/nucleon which was then fragmented on a tantalum target. The projectile fragments were analyzed with the RIPS spectrometer.…”

Section: Almentioning

confidence: 99%

“…Weimer et al reported the first observation of 37 Ar in the 1941 article "Radioactive argon A 37 " [113]. A variety of reactions were used to produce 37 Ar and the resulting activities were measured with an ionization chamber connected to a Wulf bifilar electrometer. "An artificially radioactive gas has been produced by bombarding solid samples containing potassium, chlorine, calcium, or sulfur with appropriate nuclear particles.…”

Section: Armentioning

confidence: 99%

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Discovery of the Isotopes with 11≤Z≤19

Thoennessen

2012

Atomic Data and Nuclear Data Tables

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A total of 194 isotopes with 11 ≤ Z ≤ 19 have been identified to date. The discovery of these isotopes which includes the observation of unbound nuclei, is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented. publication, the laboratory where the isotopes were produced as well as the production and identification methods are discussed. When appropriate, references to conference proceedings, internal reports, and theses are included. When a discovery includes a half-life measurement the measured value is compared to the currently adopted value taken from the NUBASE evaluation [2] which is based on the ENSDF database [3]. In cases where the reported half-life differed significantly from the adopted half-life (up to approximately a factor of two), we searched the subsequent literature for indications that the measurement was erroneous. If that was not the case we credited the authors with the discovery in spite of the inaccurate half-life.proton beam from the Berkeley linear accelerator bombarded a proportional counter filled with neon and delayed heavy particles were observed in the counter. "Two new positron active isotopes, B 8 and Na 20 , have been found to decay to excited states of Be 8 and Ne 20 , which in turn decay "instantaneously" by alpha-emission. Their half-lives are 0.65±0.1 sec. and 1/4 sec., respectively." The half-life of 20 Na is within a factor of two of the accepted value of 447.9(23) ms. 21 Na In the 1940 paper "Transmutation of the separated isotopes of neon by deuterons" Pollard et al. reported the observation of 21 Na [17]. Neon gas was bombarded with 2.6 MeV deuterons and the isotopes were separated by thermal diffusion. 21 Na produced in the reaction 20 Ne(d,n) and decay curves and absorption spectra were measured. "A rather weak gamma-ray was found but this did not decay with the 43-second half-life expected. In [the figure] the decay curve is shown. It has a half-life of 26±3 seconds and is almost certainly to be identified with Na 21 discovered by Creutz, Fox, and Sutton [18] and here produced by the reaction Ne 20 +H 2 →Na 21 +n." This half-life agrees with the currently adopted value of 22.49(4) (s). The work by Creutz et al. mentioned in the quote was only published as an abstract of a meeting. 22 Na 22 Na was discovered in 1935 by Frisch as reported in the paper "Induced radioactivity of fluorine and calcium" [19].Alpha particles from a 600 mCi radon source were used to irradiate sodium fluoride and lithium fluoride and 22 Na was formed in the reaction 19 F(α,n). "The search for Na 22 was therefore continued with sodium fluoride and lithium fluoride.In both cases weak activity was observed after prolonged bombardment. A chemical separation, kindly carried out by Prof. G. von Hevesy, showed that the active body follows the reactions of sodium, and therefore is presumably Na 22 ."The estimated half-life between one and several years is consistent with the currently adopted value of 2.6019(4) y....

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Summary and Outlook

Thoennessen¹

2016

The Discovery of Isotopes

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Energy Levels ofNa21andMg22

Cited by 24 publications

References 11 publications

Low-Lying Positive Parity States ofNe21

Low-Lying Positive Parity States ofNe21

Discovery of the Isotopes with 11≤Z≤19

Summary and Outlook

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