스킬 파일

Gamma Selection Rules

Name: Gamma Selection Rules
Author: sunlijie-msu

Deduce nuclear level Jπ by combining constraints from feeding and deexciting gamma transitions using electromagnetic selection rules. Applies D/E2 rules to primary capture transitions, D/Q or D/E2 to deexciting gammas (lifetime-dependent), and takes AND intersection of all constraints. Handles multi-valued initial Jπ via union before intersection.

sunlijie-msu2 스타2026. 2. 24.

직업
카테고리: 전산화학

스킬 내용

Gamma Transition Selection Rules — Practical Workflow: Combining Jπ Constraints Logic

Goal

Deduce the Jπ of a level by combining constraints from:

Feeding transitions — γ rays populating the level (from capture resonances above)
Deexciting transitions — γ rays depopulating the level (to lower levels below)

Multipolarity Selection Rules

Transition Type	Apply	Condition
Primary feeding γ (from resonances)	D or E2	Always
Deexciting γ (decay to lower levels)

관련 스킬

Gamma Selection Rules | Skills Pool

FOR each feeding γ:
    Apply D or E2 selection rules
    IF feeding level has multi-valued Jπ (e.g., 1/2+,3/2+):
        Calculate allowed Jπ for EACH value separately
        Take OR (union) of results
    ENDIF
ENDFOR

FOR each deexciting γ:
    IF lifetime is short (RUL applies):
        Apply D or E2 selection rules
    ELSE:
        Apply D or Q selection rules
    ENDIF
ENDFOR

Take AND (intersection) of ALL constraints above

RESULT: Common Jπ values → Put in parentheses to indicate tentative assignment

Gamma Selection Rules

Gamma Transition Selection Rules — Practical Workflow: Combining Jπ Constraints Logic

Goal

Multipolarity Selection Rules

Gamma Selection Rules

Gamma Transition Selection Rules — Practical Workflow: Combining Jπ Constraints Logic

Goal

Multipolarity Selection Rules

Workflow Algorithm

Example 1: Fed by primary γ from 7/2-, 7/2+, and 5/2+

Example 2: Fed by primary γ from 5/2-. Decay γ to 1/2+ and 5/2+ (Lifetime short, RUL applies, M2 ruled out)

Example 3: Fed by primary γ from 7/2+. Decay γ to 5/2+ (Lifetime unknown, RUL does not apply, M2 allowed)

Example 4: Fed by primary γ from 1/2+,3/2+ (multi-valued initial). Decay γ to 1/2+ and 3/2+ (Lifetime short, RUL applies, M2 ruled out)

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