Direct mass measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mi>Pd</mml:mi> <mml:mprescripts/> <mml:none/> <mml:mn>93</mml:mn> </mml:mmultiscripts> </mml:math> and implications for the isomer structures in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mi>Ag</mml:mi> <mml:mprescripts/> <mml:none/> <mml:mn>94</mml:mn> </mml:mmultiscripts> </mml:math> : Tracing the two-proton decay branch
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The first direct mass measurement of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"> <a:mmultiscripts> <a:mi>Pd</a:mi> <a:mprescripts/> <a:none/> <a:mn>93</a:mn> </a:mmultiscripts> </a:math> , the one-proton-decay daughter of the <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"> <b:mrow> <b:mo>(</b:mo> <b:msup> <b:mn>21</b:mn> <b:mo>+</b:mo> </b:msup> <b:mo>)</b:mo> </b:mrow> </b:math> isomer in <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"> <c:mmultiscripts> <c:mi>Ag</c:mi> <c:mprescripts/> <c:none/> <c:mn>94</c:mn> </c:mmultiscripts> </c:math> , has been performed, resulting in a mass excess value of <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"> <d:mrow> <d:mo>−</d:mo> <d:mn>59</d:mn> <d:mspace width="0.16em"/> <d:mn>127</d:mn> <d:mo>(</d:mo> <d:mn>35</d:mn> <d:mo>)</d:mo> </d:mrow> </d:math> keV and reducing the mass uncertainty by an order of magnitude. As a consequence, the excitation energies of the presumed parent states of the one-proton (1p) decay and two-proton (2p) decay in <f:math xmlns:f="http://www.w3.org/1998/Math/MathML"> <f:mmultiscripts> <f:mi>Ag</f:mi> <f:mprescripts/> <f:none/> <f:mn>94</f:mn> </f:mmultiscripts> </f:math> are found to differ from each other by ten standard deviations. This shows that there is an incompatibility in the previously reported decay scheme of the 1p and 2p branches. Three scenarios are discussed, which could resolve this apparent contradiction, and elucidated by performing state-of-the-art shell-model and mean-field calculations. The latter confirm that, based on the reported decay information, the 2p emission cannot be fed from the same <g:math xmlns:g="http://www.w3.org/1998/Math/MathML"> <g:mrow> <g:mo>(</g:mo> <g:msup> <g:mn>21</g:mn> <g:mo>+</g:mo> </g:msup> <g:mo>)</g:mo> </g:mrow> </g:math> isomer as the 1p emission, but indicate that it could originate from a second, structurally different, high-spin state.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.006 | 0.002 |
| Meta-epidemiology (narrow) | 0.002 | 0.002 |
| Meta-epidemiology (broad) | 0.001 | 0.003 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.004 | 0.004 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.005 | 0.004 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it